50% (1980)

50% (1967)

73% (1980)

70% (1991)

65% (2001)

68% (1991)

0% (2000)

65% (2011)

65% (1999)

57% (1985)

80% (1961)

50% (1985)

50% (1991)

50% (1976)

50% (1974)

45% (1968)

77% (1990)

50% (2006)

72% (1973)

66% (1989)