65% (1972)

45% (1982)

61% (1966)

36% (1985)

30% (1976)

61% (1965)

70% (2006)

65% (1976)

74% (1970)

67% (1960)

56% (2010)

73% (1988)

60% (1969)

60% (1990)

41% (1985)

50% (1955)

62% (1964)

64% (1988)

75% (1967)

45% (1995)