30% (2004)

35% (1999)

42% (1984)

48% (2006)

52% (1999)

40% (2012)

37% (1976)

35% (1989)

56% (1978)

64% (1988)

0% (1989)

40% (2001)

20% (2006)

20% (1979)

20% (1982)

20% (1976)

49% (1990)

45% (1980)

40% (2002)

20% (1999)