78% (1995)

72% (1988)

76% (1995)

64% (2003)

72% (1990)

73% (1996)

82% (1994)

70% (1999)

68% (1999)

66% (1991)

64% (2009)

70% (1987)

67% (1986)

74% (1987)

68% (1990)

48% (1986)

56% (1984)

60% (1999)

0% (1962)

43% (1989)