56% (1980)

69% (2014)

68% (1979)

71% (1987)

59% (1978)

60% (1977)

69% (1981)

61% (1979)

56% (2015)

68% (1988)

47% (1973)

42% (1975)

54% (1978)

59% (1979)

50% (1971)

42% (1981)

45% (1987)

30% (1983)

42% (1983)

40% (1979)