56% (1985)

50% (1984)

65% (1969)

68% (1985)

56% (1977)

68% (1981)

77% (1962)

70% (1981)

60% (1992)

60% (1982)

0% (1965)

58% (1965)

59% (1980)

35% (1978)

60% (1963)

55% (1983)

56% (1974)

45% (1987)

20% (1991)

37% (1973)