57% (1999)

39% (1994)

20% (1997)

30% (1998)

57% (2001)

28% (2000)

37% (1995)

42% (1993)

37% (1996)

35% (2003)

50% (1997)

36% (1998)

10% (1996)

46% (1995)

50% (1995)