71% (2000)

76% (1999)

73% (2003)

70% (1996)

72% (2013)

77% (1997)

70% (2010)

68% (2017)

75% (1991)

76% (2002)

71% (2012)

62% (2005)

70% (2015)

64% (2007)

64% (2015)

71% (2008)

57% (1995)

61% (2004)

70% (2008)

64% (2015)