80% (2009)

69% (2013)

69% (2007)

55% (2011)

64% (1987)

58% (1987)

60% (2007)

60% (1994)

74% (2012)

61% (2011)

50% (1992)

48% (2009)

46% (1985)

10% (1986)

0% (2011)