70% (2007)

53% (1985)

60% (2001)

70% (1972)

80% (2006)

0% (1979)

0% (1978)

64% (1989)

100% (1980)

50% (1988)

80% (2000)

50% (1969)

100% (1999)

50% (2010)

80% (1979)

0% (1979)