55% (1969)

54% (1970)

0% (1977)

33% (1984)

62% (1978)

40% (1990)

64% (2000)

32% (1973)

43% (1998)

0% (1998)

62% (2009)

35% (1986)

35% (1972)

0% (1987)

40% (2000)

65% (1973)

64% (1982)

0% (1993)

0% (1984)

57% (1968)