52% (2002)

42% (2003)

48% (2002)

52% (1999)

50% (2000)

45% (2000)

39% (2001)

42% (1998)

52% (1998)

58% (1996)

40% (2000)

40% (1999)

28% (2003)

50% (2000)

30% (2003)

42% (1999)