55% (2008)

56% (2004)

62% (1998)

66% (1998)

64% (2001)

66% (2007)

66% (2007)

61% (2000)

55% (2000)

59% (2001)

50% (2004)

51% (2000)

62% (2000)

63% (2003)

62% (1998)

46% (2005)