61% (1995)

61% (2002)

78% (1992)

56% (2001)

76% (1995)

80% (2004)

65% (1990)

73% (1989)

60% (2013)

68% (2004)

74% (2010)

80% (1977)

75% (2000)

80% (2015)

60% (1972)

66% (2006)

49% (1992)

74% (1991)

86% (1988)

63% (2007)