52% (1993)

60% (1994)

20% (1984)

0% (1982)

45% (1991)

60% (1983)

50% (1988)

70% (1983)

0% (1983)

51% (1985)

72% (1986)

0% (1982)

60% (1984)

60% (1985)

50% (1990)

42% (1994)

40% (1984)

60% (1982)

0% (1993)

60% (1989)