40% (1979)

71% (1975)

50% (1983)

40% (1979)

60% (1970)

0% (1970)

0% (1990)

60% (1961)

54% (1978)

0% (1975)

0% (1986)

43% (1980)

0% (1978)

0% (1983)

0% (1989)

40% (1982)

60% (1975)

68% (1966)

50% (1981)

50% (1978)