0% (1977)

10% (1991)

42% (1987)

0% (1976)

65% (2001)

0% (1973)

40% (2002)

0% (1980)

80% (1999)

58% (1970)

60% (1973)

77% (2001)

47% (1985)

30% (1985)

40% (1977)

65% (1998)

30% (1977)

50% (1970)

60% (1982)

50% (1980)