69% (2000)

65% (2003)

68% (1974)

66% (1987)

63% (2004)

61% (1976)

56% (1973)

59% (1976)

59% (1993)

62% (1975)

68% (1990)

67% (1997)

58% (1988)

58% (1975)

56% (1986)

65% (1991)

20% (1989)

58% (1992)

90% (2000)

35% (2024)