79% (1988)

68% (1961)

57% (1967)

65% (1970)

73% (1969)

53% (1990)

70% (1986)

63% (1990)

68% (1985)

59% (1934)

48% (1988)

72% (1964)

60% (1969)

56% (1986)

57% (1975)

56% (1982)

50% (1990)

53% (1968)

33% (1987)

57% (1973)