70% (1985)

61% (1996)

0% (1997)

50% (1985)

75% (1992)

0% (1995)

80% (1991)

43% (1982)

0% (1984)

50% (1974)

80% (1970)

70% (1991)

45% (1980)

100% (1994)

50% (1994)

0% (1994)

57% (1981)

60% (1985)

50% (1980)

60% (1992)