30% (1986)

59% (1976)

41% (1971)

60% (1993)

80% (1979)

51% (1969)

47% (1996)

73% (1977)

58% (1988)

54% (1970)

0% (1970)

59% (1967)

51% (1965)

59% (1993)

35% (1968)

58% (1990)

68% (1974)

48% (1989)

75% (1981)

54% (1987)