70% (2005)

67% (2010)

59% (2010)

78% (2003)

58% (2001)

61% (2012)

67% (2008)

72% (2007)

74% (2002)

63% (2002)

60% (1996)

73% (1989)

58% (1996)

65% (1999)

66% (1991)

64% (2015)

57% (1995)

67% (1992)

58% (1994)

66% (2024)