38% (2005)

74% (2002)

57% (1996)

72% (1999)

64% (2010)

64% (2008)

62% (2011)

36% (1992)

66% (1997)

48% (2005)

47% (2006)

48% (2011)

50% (1994)

50% (2003)

56% (2004)

42% (2003)

78% (2001)

80% (1994)

60% (1997)

73% (1999)