51% (2002)

47% (2002)

39% (2001)

42% (2003)

44% (2000)

52% (1999)

50% (2000)

50% (2000)

41% (2000)

26% (2003)

42% (1998)

48% (1999)

30% (2003)

52% (1998)

40% (1999)

58% (1996)