71% (2005)

67% (2010)

61% (2012)

60% (2010)

78% (2003)

67% (2008)

58% (2001)

72% (2007)

74% (2002)

62% (2002)

58% (1996)

73% (1989)

61% (1996)

66% (1999)

66% (1991)

57% (1995)

64% (2015)

62% (2024)

58% (1994)

67% (1992)