60% (1996)

73% (1982)

67% (1967)

72% (1998)

72% (1978)

71% (1996)

71% (1993)

67% (1969)

77% (1980)

71% (1994)

54% (1991)

58% (1988)

78% (1970)

72% (1976)

59% (1983)

60% (1994)

65% (2001)

65% (1992)

72% (1984)

67% (1973)