72% (2012)

67% (2016)

74% (2018)

72% (2016)

56% (2008)

37% (2010)

52% (2010)

63% (2014)

56% (2010)

60% (2011)

42% (2012)

47% (2012)

50% (2011)

55% (2011)

0% (1970)