48% (2006)

100% (1990)

0% (1980)

20% (1978)

35% (2004)

30% (2004)

0% (1977)

20% (1992)

30% (1987)

50% (1988)

45% (1999)

20% (1982)

42% (1984)

47% (2005)

20% (1989)

42% (1976)

0% (1981)

40% (2002)

40% (1990)

35% (2004)