59% (1996)

86% (2013)

81% (2017)

78% (2002)

83% (2009)

79% (2002)

44% (2001)

50% (1980)

55% (2006)

62% (2007)

67% (2003)

60% (1977)

75% (1984)

72% (1985)

69% (2007)

77% (2020)

55% (1978)

89% (2011)

76% (1981)

44% (2004)