50% (2010)

50% (1988)

53% (1985)

65% (1989)

100% (1980)

70% (2007)

79% (1969)

80% (2006)

80% (1983)

60% (2001)

73% (2000)

50% (1969)

0% (1978)

70% (1972)

0% (1979)

0% (1979)

80% (1979)

100% (1999)

0% (2010)

30% (1984)