71% (2005)

67% (2010)

59% (2010)

58% (2001)

74% (2002)

67% (2008)

78% (2003)

72% (2007)

61% (2012)

72% (1989)

62% (2002)

66% (1999)

60% (1996)

58% (1996)

57% (1995)

67% (1991)

65% (2015)

58% (1994)

59% (2024)

69% (1992)