81% (2005)

80% (1989)

86% (2004)

85% (2016)

74% (1999)

84% (2018)

83% (2005)

67% (1989)

82% (2018)

70% (2005)

85% (2000)

84% (1999)

78% (2001)

81% (2008)

83% (2013)

76% (2014)

84% (1993)

78% (2011)

79% (2019)

81% (2020)