69% (1993)

50% (2004)

40% (1997)

71% (1990)

25% (2009)

65% (1988)

55% (1999)

30% (1983)

63% (2013)

0% (1984)

80% (1990)

0% (1982)

0% (1983)

0% (1979)

0% (1981)

0% (1986)

0% (1984)

0% (2006)

60% (1981)

0% (1978)