83% (1985)

73% (1974)

67% (1975)

52% (1981)

55% (1979)

41% (1976)

56% (1987)

63% (1977)

0% (1984)

40% (1979)

58% (1965)

80% (1977)

85% (1966)

48% (1983)

60% (1991)

40% (1983)

0% (1988)

58% (1974)

70% (1967)

40% (1990)