50% (1986)

64% (1993)

60% (1964)

57% (1971)

63% (1991)

57% (1966)

70% (1975)

70% (1983)

10% (1993)

43% (1985)

70% (1988)

50% (1988)

58% (1983)

58% (1971)

63% (1968)

0% (1993)

60% (1997)

54% (1960)

63% (1971)

0% (1989)