50% (1990)

65% (1979)

80% (1970)

75% (1992)

80% (1991)

0% (1997)

0% (1994)

43% (1982)

50% (1985)

45% (1980)

60% (1989)

70% (1991)

50% (1974)

50% (1980)

70% (1985)

0% (1995)

70% (1980)

100% (1986)

75% (1993)

0% (1993)