63% (1979)

70% (1992)

10% (1982)

0% (1986)

10% (1983)

55% (1981)

40% (1983)

0% (1975)

0% (1985)

50% (1981)

57% (1983)

0% (1993)

0% (1986)

85% (1984)

0% (1992)

0% (2006)