68% (1999)

64% (1990)

70% (1992)

59% (2003)

53% (1967)

67% (2007)

57% (1996)

64% (1965)

64% (1987)

66% (2004)

56% (2001)

72% (1998)

77% (2020)

70% (1993)

73% (1965)

76% (1982)

72% (1979)

60% (2005)

58% (2011)

68% (1984)