30% (1995)

53% (1994)

40% (2002)

57% (1971)

55% (1995)

70% (1980)

70% (1994)

42% (2009)

40% (1994)

33% (2011)

20% (2008)

37% (1994)

57% (1994)

70% (1988)

30% (1978)

50% (1975)

65% (1964)

52% (1982)

60% (1988)

65% (1988)