20% (2004)

65% (1986)

0% (1979)

70% (1981)

40% (1998)

71% (1999)

0% (2006)

50% (1993)

65% (2006)

0% (1974)

0% (1990)

73% (2003)

0% (1980)

70% (1987)

35% (1987)

60% (1988)

0% (1969)

0% (1987)

95% (1998)

0% (1977)