62% (2011)

57% (1996)

72% (1999)

73% (1999)

64% (2010)

36% (1992)

64% (2008)

49% (2007)

56% (2004)

38% (2005)

42% (2003)

60% (1997)

49% (2001)

40% (1996)

74% (2002)

50% (1999)

48% (2011)

78% (2001)

70% (2003)

37% (2007)