55% (1969)

62% (1978)

40% (1990)

32% (1973)

0% (1984)

54% (1970)

0% (1987)

62% (2009)

64% (2000)

0% (1977)

0% (1998)

64% (1982)

35% (1986)

70% (1982)

65% (1973)

33% (1984)

0% (1993)

35% (1972)

60% (1995)

57% (1968)