63% (1971)

88% (2002)

87% (1999)

93% (1985)

81% (1988)

84% (2015)

75% (1975)

92% (1989)

80% (2012)

82% (2011)

95% (2013)

80% (1981)

77% (2007)

84% (1978)

88% (2009)

55% (1996)

0% (2007)

75% (2004)

80% (1983)

83% (2006)