69% (2013)

80% (2009)

69% (2007)

76% (2004)

55% (2011)

75% (2012)

60% (1994)

59% (2007)

64% (1987)

46% (1985)

50% (1992)

59% (2011)

48% (2009)

10% (1986)

0% (2011)