30% (1989)

30% (1991)

50% (2008)

54% (2004)

25% (2001)

57% (2005)

60% (2007)

20% (1992)

69% (2007)

62% (1985)

0% (1978)

60% (2005)

27% (2009)

60% (1997)

40% (2010)

43% (1984)

15% (1991)

0% (1978)

44% (1994)

45% (1990)