65% (1993)

64% (1981)

73% (1992)

64% (1991)

55% (1994)

60% (1988)

65% (1992)

55% (1993)

0% (1979)

26% (1979)

30% (1979)

58% (1982)

50% (1985)

63% (1991)

64% (1985)

0% (1979)

56% (1997)

50% (1991)

57% (1993)

50% (1997)