71% (1976)

0% (1970)

10% (1984)

74% (1984)

80% (1984)

77% (1983)

0% (1980)

60% (1978)

70% (1983)

68% (1983)

88% (1982)

82% (1975)

45% (1979)

80% (1977)

83% (1980)

74% (1980)

70% (1988)

62% (1985)

10% (1989)

0% (2003)