30% (1980)

60% (1993)

51% (1965)

52% (1970)

58% (1990)

30% (1986)

48% (1989)

47% (1996)

70% (1969)

70% (1968)

0% (1991)

80% (1979)

50% (1962)

37% (1964)

70% (1967)

60% (1968)

75% (1981)

0% (1992)

59% (1993)

40% (1963)