  	-   	
  	3	1971, 1973, 1974
  	3	1983, 1984, 1985
   	3	1988, 1989, 1992
   	2	1957, 1959
  	2	1972, 1976
  	2	1978, 1979
 - 	2	1980, 1981
 	2	1997, 2002