10% (1997)

55% (1991)

46% (1993)

59% (1962)

48% (1966)

50% (1961)

50% (1959)

50% (1965)

52% (1992)

52% (1990)

40% (1985)

50% (1969)

50% (1989)

52% (1968)

50% (1982)

55% (1981)

44% (1985)

58% (1990)

57% (1987)

50% (1968)