81% (1984)

78% (1987)

63% (2002)

59% (2000)

73% (1995)

64% (2000)

72% (1994)

69% (1993)

75% (1999)

62% (2005)

68% (1991)

72% (1977)

75% (2011)

70% (1985)

68% (2001)

65% (1982)

53% (1997)

64% (2001)

69% (2023)

62% (2001)