55% (1978)

50% (1994)

60% (1996)

40% (1977)

0% (2000)

55% (1980)

0% (1976)

0% (1977)

51% (1981)

80% (1999)

27% (1997)

0% (1973)

0% (1975)

50% (1992)

68% (1979)

47% (1985)

0% (2002)

64% (2001)

0% (2006)

63% (1988)