75% (1974)

60% (1975)

58% (1996)

76% (1969)

60% (1973)

59% (1976)

59% (1968)

48% (1983)

60% (1974)

45% (1997)

56% (1975)

50% (1977)

58% (1973)

62% (2003)

43% (1999)

55% (1973)

60% (1995)

50% (1991)

65% (1985)

65% (1995)