42% (2003)

51% (2002)

40% (1999)

47% (2002)

52% (1999)

44% (2000)

39% (2001)

50% (2000)

26% (2003)

52% (1998)

42% (1998)

58% (1996)

48% (1999)

50% (2000)

41% (2000)

30% (2003)