51% (2005)

63% (1982)

48% (2005)

58% (1982)

62% (1981)

65% (1982)

65% (1966)

43% (1980)

58% (1982)

20% (1980)

80% (1996)

64% (1991)

42% (1979)

100% (1976)

57% (1988)

30% (1983)

60% (1991)

80% (1981)

40% (1990)

60% (1985)