71% (1971)

74% (1981)

77% (1970)

53% (1974)

47% (2005)

20% (1991)

72% (1982)

44% (1972)

64% (1979)

50% (1976)

50% (1984)

48% (1984)

66% (1978)

73% (1970)

67% (1988)

63% (1973)

59% (1984)

69% (1986)

56% (2014)

0% (1977)