80% (1969)

60% (1979)

75% (1992)

70% (1980)

80% (1991)

60% (1989)

60% (1985)

0% (1995)

58% (1977)

50% (1990)

72% (1989)

0% (1997)

58% (1989)

0% (1984)

50% (1974)

43% (1982)

100% (1986)

50% (1994)

57% (1982)

50% (1981)