63% (2000)

64% (1988)

44% (1967)

0% (1974)

0% (1976)

70% (1975)

50% (1961)

81% (1972)

42% (1986)

54% (1972)

61% (1968)

57% (1986)

75% (1989)

0% (1995)

0% (1976)

48% (1961)

58% (1971)

50% (1980)

52% (1985)

50% (1970)