60% (1999)

28% (2000)

45% (1994)

55% (2001)

50% (1997)

35% (2003)

46% (1995)

37% (1996)

42% (1995)

46% (1993)

10% (1996)

32% (1998)

30% (1998)

25% (1997)

50% (1995)