0% (1982)

70% (1992)

57% (1991)

64% (1989)

56% (1991)

47% (1986)

75% (1989)

64% (1984)

70% (1981)

61% (1986)

65% (1992)

58% (1980)

65% (1987)

0% (1990)

49% (1991)

58% (1988)

53% (1983)

58% (1992)

67% (1983)

71% (1983)