50% (1964)

50% (1950)

52% (1979)

0% (1980)

50% (1983)

63% (1991)

61% (1981)

50% (1986)

0% (1991)

57% (1980)

0% (1983)

57% (1988)

58% (1984)

45% (1970)

58% (1981)

54% (1960)

57% (1989)

0% (1985)

60% (1985)

63% (1966)