0% (2003)

64% (1973)

62% (2002)

70% (1997)

64% (1989)

53% (1990)

70% (1983)

63% (1992)

57% (1980)

72% (1972)

60% (1979)

50% (1972)

0% (1976)

62% (1989)

0% (1989)

58% (1985)

90% (1981)

0% (1977)

0% (1989)

67% (1977)