60% (1998)

58% (2004)

57% (2003)

50% (2001)

63% (2002)

63% (2000)

46% (2000)

39% (1999)

60% (2000)

48% (2000)

31% (2003)

43% (1998)

61% (2000)

60% (1997)

50% (1999)

58% (2003)

61% (1996)

21% (2004)

26% (2004)

75% (2002)