20% (2011)

20% (1990)

48% (2006)

20% (1980)

30% (2004)

45% (1990)

15% (1991)

49% (1990)

40% (2004)

20% (1979)

20% (1979)

53% (2007)

20% (1979)

56% (1978)

20% (1988)

20% (2006)

20% (1987)

35% (2004)

20% (1998)

37% (2001)