56% (2003)

62% (2005)

42% (2003)

37% (2004)

43% (1999)

52% (2001)

57% (2002)

40% (1998)

60% (2002)

50% (2003)

61% (1999)

67% (2005)

48% (2005)

58% (2006)

56% (2004)

17% (2003)