34% (2003)

50% (1993)

50% (1978)

52% (1979)

50% (1987)

58% (1989)

50% (1977)

52% (2002)

50% (1997)

50% (1996)

41% (1976)

30% (1998)

0% (1997)

50% (1998)

55% (1995)

50% (1990)

0% (1992)

50% (1989)

50% (1995)