67% (1996)

58% (2006)

62% (1998)

56% (2004)

58% (2005)

59% (2000)

63% (2003)

62% (2012)

65% (2016)

62% (1995)

68% (1998)

59% (2010)

58% (2009)

58% (2003)

64% (1998)

64% (2017)

62% (1994)

56% (2005)

57% (2007)

43% (2001)