63% (1973)

64% (1990)

58% (1967)

20% (1985)

56% (1983)

37% (1987)

62% (2001)

63% (1971)

15% (2001)

39% (1998)

50% (1982)

30% (1993)

70% (1993)

62% (2013)

52% (1989)

63% (1993)

58% (1993)

70% (1996)

62% (2004)

61% (2022)