42% (1999)

62% (2005)

58% (2006)

56% (2003)

57% (2002)

41% (2003)

59% (1999)

40% (1998)

67% (2005)

46% (2001)

44% (2005)

50% (2003)

55% (2002)

40% (2004)

60% (2004)

15% (2003)