62% (2011)

64% (2010)

37% (2005)

65% (2008)

49% (2003)

56% (2004)

66% (1997)

62% (1994)

78% (2001)

56% (1996)

72% (1999)

48% (2011)

58% (2000)

62% (1998)

48% (2004)

50% (2003)

57% (1996)

42% (2003)

49% (1996)

40% (1996)