58% (1994)

63% (1967)

68% (1986)

67% (1990)

62% (1993)

57% (1993)

25% (1994)

59% (1993)

63% (2003)

67% (1998)

73% (2006)

68% (2010)

68% (2002)

65% (2005)

70% (1987)

47% (1996)

44% (1992)

50% (1989)

56% (1973)

62% (1987)