76% (2008)

73% (2008)

59% (2005)

68% (2003)

62% (1999)

63% (2006)

54% (2007)

58% (1999)

59% (2005)

47% (2007)

50% (2000)

38% (2005)

36% (2007)

58% (2009)

44% (2005)