43% (1980)

60% (1990)

55% (2004)

46% (1987)

72% (1986)

61% (1980)

55% (1978)

0% (1993)

54% (2003)

57% (1973)

0% (1972)

0% (1976)

0% (1980)

65% (1978)

71% (2006)

71% (1977)

0% (1992)

0% (1985)

67% (1981)

66% (1994)