47% (2009)

20% (1985)

40% (1984)

0% (1975)

20% (1982)

20% (1984)

57% (2005)

20% (1984)

30% (2010)

62% (1997)

70% (2000)

50% (1989)

20% (1982)

20% (1988)

45% (1996)

20% (1992)

20% (1993)

20% (2003)

20% (1979)

60% (2007)