20% (2000)

20% (1988)

54% (1994)

45% (1998)

0% (1990)

10% (2003)

45% (1992)

45% (1997)

35% (1999)

47% (2005)

0% (1982)

39% (1998)

45% (1995)

60% (1989)

50% (1994)

0% (1992)

10% (1993)

35% (1999)

60% (1994)

40% (2002)