65% (1993)

65% (1992)

55% (1994)

71% (1992)

56% (1997)

62% (1981)

58% (1982)

64% (1985)

0% (1979)

65% (1991)

53% (1980)

50% (1991)

60% (1988)

40% (1979)

55% (1993)

50% (1997)

50% (1985)

70% (1996)

0% (1979)

30% (1979)