67% (1996)

59% (2000)

62% (2012)

66% (2016)

63% (2003)

56% (2004)

59% (2006)

58% (2005)

59% (2010)

64% (2017)

62% (1995)

64% (1998)

62% (1998)

68% (1998)

58% (2009)

57% (2007)

47% (1995)

58% (2003)

62% (2005)

56% (2005)