15% (2006)

20% (1997)

65% (2009)

55% (1996)

0% (1995)

70% (1988)

52% (2006)

63% (2001)

20% (2003)

0% (2005)

75% (2004)

0% (2013)

37% (1962)

0% (2008)

0% (1995)

0% (2007)

60% (1996)

0% (2006)

15% (2004)

0% (2005)