71% (2005)

62% (2004)

50% (1999)

69% (2006)

64% (2003)

20% (1996)

0% (1998)

55% (2007)

69% (1972)

52% (2005)

68% (2008)

57% (2003)

57% (1999)

0% (2014)

62% (2007)

50% (2001)

46% (2007)

58% (2002)