50% (1985)

50% (1975)

0% (1983)

0% (1993)

56% (1990)

62% (1971)

0% (1991)

60% (1981)

50% (1954)

72% (1973)

68% (2006)

68% (2001)

60% (1995)

50% (1977)

55% (1983)

75% (2006)

50% (1991)

65% (1986)

60% (1983)

72% (2006)