60% (1996)

36% (2003)

35% (2007)

40% (2004)

10% (1992)

10% (1995)

0% (1994)

0% (1990)

0% (1989)

0% (1988)

60% (1999)

54% (1999)

100% (1990)

0% (1993)

40% (1999)

60% (1997)

0% (1991)

0% (1984)

0% (1992)

20% (1985)