81% (1960)

65% (2000)

58% (1967)

70% (1988)

75% (1987)

60% (1987)

67% (1968)

71% (1986)

64% (2014)

58% (1986)

69% (1987)

57% (1987)

70% (1964)

65% (1958)

63% (1990)

59% (1985)

76% (1997)

66% (1988)

45% (1990)

55% (1987)