80% (1981)

68% (1982)

66% (1970)

58% (1979)

61% (1979)

59% (1969)

35% (1976)

60% (1988)

60% (1985)

68% (1970)

0% (1991)

51% (1973)

20% (1972)

40% (1985)

50% (1965)

58% (1990)

60% (1980)

60% (1981)

51% (1982)

0% (1990)