53% (2002)

65% (2003)

74% (2006)

50% (1979)

0% (1979)

64% (2010)

55% (1985)

65% (1981)

54% (2004)

54% (2005)

53% (2001)

72% (1998)

50% (1980)

60% (1984)

0% (1983)

0% (1986)

0% (1985)