Table:
text: Panellinios B.C.
Seasons
Seasons
Season Greek_League Greek_Cup Europe Coach Roster_
1928-29 Champion - - Nikos Nisiotis Christos Svolopoulos, Dimitris Sidiropoulos, Evagelinos, Sfikas, Spiridakis, Alexandros Sidiropoulos, Symeonidis, Skepers
1938-39 Champion - -  
1939-40 Champion - -  
1949-50 Finalist - -  
1950-51 Finalist - -  
1952-53 Champion - -  Themis Cholevas, Panagiotis Manias, Kostas Papadimas, Mimis Stefanidis, Aristidis Roubanis
1953-54 Finalist - -  
1954-55 Champion - -  Antonis Christeas
1956-57 Champion - -  Antonis Christeas, Themis Cholevas, Kostas Papadimas, Mimis Stefanidis, Giorgos Moshos, Sakkelis, Mavroleon, Karvelas, Makrinikolas, Lekkas
1957-58 _ - Euroleague , Last 32  
1969-70 3rd place _ _  Vasilis Goumas
1974-75 _ - Korać Cup , Last 32  Vasilis Goumas

Question: How many years did Panellinios BC have a finalist in the Greek league?