No of Teams Seasons Seasons
10 teams 9 seasons 49/50-50/51-52/53-53/54-54/55#-58/59-59/60-60/61-61/62
11 teams 2 seasons 48/49-55/56
12 teams 13 seasons 64/65-65/66-66/67-71/72#-72/73-78/79-82/83-83/84-84/85-85/86-86/87-87/88-88/89
14 teams 17 seasons

56/57-77/78-80/81-81/82-89/90#-91/92-92/93-93/94-94/95-98/99-99/00-00/01-01/02-02/03-03/04-04/05-05/06

15 teams 1 season 76/77
16 teams 10 seasons 57/58*-79/80-95/96-96/97-97/98-06/07-07/08-08/09-09/10-10/11
18 teams 4 seasons 73/74#-74/75-90/91-12/13*#
19 teams 1 season 11/12*#
20 teams 1 season 14/15
22 teams 1 season 13/14*
24 teams 3 seasons 62/63*-63/64*-75/76*
* 2 group system in 6 seasons (57/58,62/63,63/64,75/76, 2012/13 & 2013/14).
# Unfinished seasons 6 (54/55, 71/72, 73/74, 89/90, 11/12 & 12/13)
In Only 1 season the competition was not held (51/52) to prepare for Helsinki Olympic Games