20% (1984)

61% (1999)

55% (2002)

100% (1998)

55% (1999)

0% (1978)

0% (1999)

20% (1999)

0% (1998)

0% (1997)

50% (2000)

40% (1999)

60% (1981)

20% (1993)

55% (1999)

20% (1998)

20% (1998)

0% (1999)

10% (2001)

20% (1997)