80% (2016)

65% (2012)

63% (2011)

63% (2010)

60% (2009)

62% (2010)

61% (2015)

61% (2020)

72% (2008)

75% (2013)

72% (2015)

60% (2013)

56% (2010)

61% (2011)

0% (1970)