41% (2000)

49% (2001)

49% (2011)

67% (2004)

26% (1997)

82% (2003)

50% (2003)

66% (1984)

66% (2004)

62% (1987)

52% (2009)

67% (1999)

0% (1974)

52% (2006)

53% (2002)

0% (2009)

65% (2011)

55% (2008)

62% (2007)

60% (2002)