54% (1990)

50% (1982)

80% (1997)

55% (1984)

74% (1992)

52% (1984)

20% (1980)

69% (1981)

45% (1981)

60% (1995)

58% (1993)

30% (1990)

45% (1982)

0% (1978)

40% (1988)

48% (1982)

70% (1989)