69% (2014)

56% (1980)

59% (1978)

68% (1979)

71% (1987)

69% (1981)

60% (1977)

61% (1979)

42% (1981)

0% (1976)

47% (1980)

54% (1978)

50% (1973)

60% (1976)

42% (1975)

59% (1979)

48% (1974)

70% (1973)

50% (1971)

68% (1988)