67% (1992)

76% (1988)

55% (1971)

74% (1994)

66% (2003)

71% (1997)

54% (1994)

79% (1999)

61% (1999)

78% (1999)

60% (1960)

20% (2012)

59% (1993)

55% (1992)

69% (1985)

66% (2001)

73% (1964)

72% (1994)

75% (2000)

64% (1995)