| Year
|
Debuting clubs
|
| Teams
|
No.
|
Cum.
|
| 1955–56
|
 AGF,  Anderlecht,  Djurgårdens,  Gwardia Warsaw,  Hibernian,  Milan,  MTK[10],  Partizan,  PSV Eindhoven,  Rapid Wien,  Real Madrid,  Reims,  Rot-Weiss Essen,  Saarbrücken,  Servette,  Sporting CP
|
16
|
16
|
| 1956–57
|
Athletic Bilbao, Borussia Dortmund,  CSKA Sofia[11],  Dinamo București, Fiorentina,  Galatasaray, Grasshopper, IFK Norrköping,  Kispest-Honvéd[12],  Manchester United, Roda JC Kerkrade[13], Legia Warsaw[14], Nice, Porto, Rangers, Red Star Belgrade,  Slovan Bratislava[15],  Spora Luxembourg
|
18
|
34
|
| 1957–58
|
Ajax, Benfica, Dukla Prague, FCSB[16],  Glenavon, Royal Antwerp, Saint-Étienne, Sevilla,  Shamrock Rovers, Stade Dudelange,  Vasas,  Wismut Karl-Marx-Stadt[17], Young Boys
|
13
|
47
|
| 1958–59
|
Ards, Atlético Madrid, Beşiktaş, Dinamo Zagreb[18], DHSC[19], Drumcondra, Hearts of Midlothian,  Helsingin Palloseura, IFK Göteborg, Jeunesse Esch, Juventus, KB,  Olympiacos, Petrolul Ploiești, Polonia Bytom, Schalke 04, Standard Liège, Wiener Sport-Club, Wolverhampton Wanderers
|
19
|
66
|
| 1959–60
|
Barcelona, Boldklubben 1909, Csepel, Eintracht Frankfurt, Fenerbahçe, Inter Bratislava[20], KuPS, Linfield, ŁKS Łódź, Sparta Rotterdam, Vorwärts Berlin[21]
|
10
|
76
|
| 1960–61
|
Burnley,  Fredrikstad, Hamburger SV, Hradec Králové[22], IFK Helsingfors, IFK Malmö, Lierse, Limerick, Panathinaikos, Újpest[23]
|
10
|
86
|
| 1961–62
|
1. FC Nürnberg, Feyenoord, Górnik Zabrze, Haka[24],  Hibernians, Monaco, Tottenham Hotspur
|
7
|
93
|
| 1962–63
|
1. FC Köln, Dundee, Esbjerg, Floriana, Ipswich Town,  Partizani, Shelbourne, Union Luxembourg
|
8
|
101
|
| 1963–64
|
AEK Athens,  Anorthosis Famagusta, Dundalk, Everton, Ferencváros, Inter Milan, Lisburn Distillery, Lyn, Motor Jena[25], Spartak Plovdiv, Valletta, Zürich
|
12
|
113
|
| 1964–65
|
Aris Bonnevoie, Bologna, Chemie Leipzig, DWS, ETO[26], Glentoran,  KR, La Chaux-de-Fonds, Liverpool, Lokomotiv Sofia, Malmö FF, Reipas Lahti, Sliema Wanderers
|
13
|
126
|
| 1965–66
|
17 Nëntori, APOEL, Derry City, HJK, Keflavík, Kilmarnock, LASK, Lausanne-Sport, Levski Sofia, Nantes, Sparta Prague, Werder Bremen
|
12
|
138
|
| 1966–67
|
1860 Munich, Admira Wacker[27], Celtic, Omonia,  Torpedo Moscow, Våleranga, Vojvodina, Waterford
|
8
|
146
|
| 1967–68
|
Basel,  Botev Plovdiv, Dynamo Kyiv[28], Dinamo City, Eintracht Braunschweig, FC Karl-Marx-Stadt[29], Hvidovre, Olympiakos Nicosia,  Rapid Bucureşti, Sarajevo[30], Skeid, Valur
|
12
|
158
|
| 1968–69
|
AB, AEL Limassol, Manchester City, Rosenborg, Ruch Chorzów, Spartak Trnava[31]
|
6
|
164
|
| 1969–70
|
Avenir Beggen, Bayern Munich, Leeds United, Öster, TPS, UTA Arad
|
6
|
170
|
| 1970–71
|
Austria Wien, Borussia Mönchengladbach, Cagliari, EPA Larnaca, KPV, Spartak Moscow
|
6
|
176
|
| 1971–72
|
Arsenal, Cork Hibernians, CSKA Moscow, Dynamo Dresden, Hadjuk Split[32], ÍA, Marseille, Strømsgodset, Valencia, Wacker Innsbruck
|
10
|
186
|
| 1972–73
|
Argeș Pitești, Derby County, Magdeburg, Vejle, Željezničar[30]
|
5
|
191
|
| 1973–74
|
Åtvidaberg, Club Brugge, Crusaders, Fram, Stal Mielec, Viking, Zorya Luhansk[28]
|
7
|
198
|
| 1974–75
|
Ararat Yerevan[33], Coleraine, Cork Celtic, Linz[34], Universitatea Craiova
|
5
|
203
|
| 1975–76
|
Bohemians, Molenbeek
|
2
|
205
|
| 1976–77
|
Baník Ostrava, Køge, PAOK, Torino, Trabzonspor
|
5
|
210
|
| 1977–78
|
Halmstad, Lillestrøm, Sligo Rovers, Śląsk Wrocław
|
4
|
214
|
| 1978–79
|
Nottingham Forest, Odense, Progrès Niedercorn, Vllaznia, Wisła Kraków, Zbrojovka Brno
|
6
|
220
|
| 1979–80
|
Beveren, BFC Dynamo, Dinamo Tbilisi[35], Red Boys Differdange, Start, Starsbourg
|
6
|
226
|
| 1980–81
|
Aberdeen, ÍBV,  Szombierki Bytom
|
3
|
229
|
| 1981–82
|
Athlone Town, Aston Villa, AZ Alkmaar, OPS,  Real Sociedad, Widzew Łódź
|
6
|
235
|
| 1982–83
|
Víkingur Reykjavík
|
1
|
236
|
| 1983–84
|
Bohemians Prague, Dinamo Minsk[36], Dundee United,  Ħamrun Spartans, Kuusysi, Lech Poznań, Roma
|
7
|
243
|
| 1984–85
|
Bordeaux, Dnipro[28], Elbasani[37], Ilves, Lyngby, Vfb Stuttgart
|
6
|
249
|
| 1985–86
|
Hellas Verona, Rabat Ajax, Zenit Leningrad[38]
|
3
|
252
|
| 1986–87
|
 Beroe, Brøndby, Örgryte, Vítkovice
|
4
|
256
|
| 1987–88
|
Napoli, Neuchâtel Xamax, Vardar[39]
|
3
|
259
|
| 1988–89
|
 AEL, Moss
|
2
|
261
|
| 1989–90
|
Luzern, Mechelen, Swarovski Tirol
|
3
|
264
|
| 1990–91
|
KA, Portadown, St Patrick's Athletic
|
3
|
267
|
| 1991–92
|
1. FC Kaiserslautern, Apollon Limassol,  Etar Veliko Tarnovo, Flamurtari, Hansa Rostock, Sampdoria, Zagłębie Lubin
|
7
|
274
|
| 1992–93
|
 KÍ,  Maccabi Tel Aviv,  Norma Tallinn,  Olimpija Ljubljana, Sion,  Skonto,  Tavriya Simferopol,  Žalgiris
|
8
|
282
|
| 1993–94
|
Aarau, AIK, B68, Beitar Jerusalem, Copenhagen,  Cwmbrân Town, Ekranas,  Zimbru Chișinău
|
8
|
290
|
| 1994–95
|
Maccabi Haifa, Red Bull Salzburg[40], Silkeborg, Vác
|
4
|
294
|
| 1995–96
|
AaB, Blackburn Rovers
|
2
|
296
|
| 1996–97
|
 Spartak Vladikavkaz, Auxerre
|
2
|
298
|
| 1997–98
|
Barry Town, Constructorul Chișinău, GÍ, Jazz, Kareda,  Košice, Lantana, Maribor,  Neftçi, Paris Saint-Germain, Parma,  Pyunik,  Sileks,  Slavia Mozyr[41]
|
14
|
312
|
| 1998–99
|
B36, Cliftonville, Flora, Kapaz, Lens, Lovech[42],  Obilić, Metz, Sturm Graz, Yerevan
|
10
|
322
|
| 1999–00
|
Araks Ararat[43], Bayer Leverkusen, Boavista, Chelsea, Dnepr Mogilev, Genk, Hapoel Haifa, HB, Hertha BSC, Lazio, Lyon, Mallorca, Molde,  Rijeka, Sloga Jugomagnat, Teplice,  Tirana, Willem II
|
18
|
340
|
| 2000–01
|
BATE Borisov, Birkirkara,  Brotnjo, Deportivo La Coruña, Dunaújváros[44], F91 Dudelange, Hapoel Tel Aviv, Heerenveen, Helsingborgs IF, Herfølge, Kaunas, Levadia[45], Lokomotiv Moscow, Polonia Warsaw, Shakhtar Donetsk, Shamkir, Shirak, St. Gallen, The New Saints[46], Tirol Innsbruck,  Torpedo Kutaisi
|
21
|
361
|
| 2001–02
|
Brann, Lille, Lugano, Sheriff Tiraspol, Slavia Prague, Spartak Yerevan[47], VB, Željezničar
|
8
|
369
|
| 2002–03
|
Belshina Bobruisk, Grazer AK, Hammarby IF, Newcastle United, Slovan Liberec, Tampere United, Zagreb, Zalaegerszeg,  Zhenis, Žilina
|
10
|
379
|
| 2003–04
|
Celta Vigo, Grevenmacher, Irtysh, Leotar
|
4
|
383
|
| 2004–05
|
Gomel, ND Gorica, Pobeda, Rhyl, Široki Brijeg,  WIT Georgia
|
6
|
389
|
| 2005–06
|
Debrecen, FH, Kairat, Petržalka[48], Rabotnicki, Real Betis, Thun, Udinese, Zrinjski Mostar
|
9
|
398
|
| 2006–07
|
Aktobe, Baku, Cheivo, Cork City, Liepājas Metalurgs, Mladá Boleslav, MyPa, Osasuna, Ružomberok, Shakhtyor Soligorsk, Sioni, TVMK
|
12
|
410
|
| 2007–08
|
Domžale, IF Elfsborg, Khazar Lankaran, Marsaxlokk, Metalurgi Rustavi[49],  Murata,  Rànger's, Toulouse, Ventspils,  Zeta
|
10
|
420
|
| 2008–09
|
Alfa Modriča, Budućnost Podgorica,  CFR Cluj, Drogheda United, FC Santa Coloma, Llanelli, NSÍ Runavík, Şamaxı[50], Twente, Villarreal, Vitória
|
11
|
431
|
| 2009–10
|
EB/Streymur, Inter Turku, Kalmar FF, Makedonija GP, Mogren, Poli Timişoara, Rubin Kazan, Sant Julià, Sivasspor, Tre Fiori Stabæk, Unirea Urziceni
|
12
|
443
|
| 2010–11
|
Bursaspor, Koper, Renova, Rudar Pljevlja
|
4
|
447
|
| 2011–12
|
Bangor City, Borac Banja Luka, Breiðablik, Dacia Chişinău, Oțelul Galați, Shkëndija, Skënderbeu, Tobol, Vaslui, Videoton, Viktoria Plzeň, Zestaponi
|
12
|
459
|
| 2012–13
|
Braga, Ironi Kiryat Shmona, Ludogorets Razgrad, Lusitanos, Málaga, Montpellier, Motherwell, Nordsjælland, Shakhter Karagandy,  Tre Penne, Ulisses
|
11
|
470
|
| 2013–14
|
Daugava, Fola Esch, Metalist Kharkiv, Nõmme Kalju, Paços de Ferreira, Sutjeska, Zulte Waregem
|
7
|
477
|
| 2014–15
|
La Fiorita,  Lincoln Red Imps, Qarabağ, Urartu[51]
|
4
|
481
|
| 2015–16
|
Dila, Folgore, Midtjylland, Milsami Orhei, Stjarnan, Trenčín
|
6
|
487
|
| 2016–17
|
Alashkert, Astra Giurgiu, Hapoel Be'er Sheva, Leicester City, Liepāja, Rostov, SJK, Titograd[52]
|
8
|
495
|
| 2017–18
|
Europa, İstanbul Başakşehir, FCI Tallinn, Kukësi, Mariehamn, Samtredia, Spartaks Jūrmala,  Trepça '89, TSG Hoffenheim, Viitorul Constanța, Víkingur Gøta
|
11
|
506
|
| 2018–19
|
Drita, Sūduva
|
2
|
508
|
| 2019–20
|
Ararat-Armenia, Atalanta, Feronikeli, Iberia 1999[53], Krasnodar, Piast Gliwice, Riga
|
7
|
515
|
| 2020–21
|
Celje, Connah's Quay Nomads, Dynamo Brest, Inter Club d'Escaldes, Rennes
|
5
|
520
|
| 2021–22
|
Mura, Prishtina, Teuta
|
3
|
523
|
| 2022–23
|
Ballkani, Bodø/Glimt, Dinamo Batumi, RFS, Shkupi
|
5
|
528
|
| 2023–24
|
Atlètic Club d'Escaldes, BK Häcken, Dnipro-1, Farul Constanța, Larne, Raków Częstochowa, Struga, Swift Hesperange,  TSC, Valmiera
|
10
|
538
|
| 2024–25
|
Brest, Dečić, Differdange 03, Egnatia, Girona, Jagiellonia Białystok, Ordabasy, Panevėžys, UE Santa Coloma, Virtus
|
10
|
548
|
| 2025–26
|
Noah, Pafos, Union Saint-Gilloise
|
3
|
551
|
| 2026–27
|
Sabah, RB Leipzig, Kauno Žalgiris, Petrocub Hîncești, NEC, Mjällby AIF, ML Vitebsk
|
7
|
558
|
