67% (2014)

46% (2007)

65% (1997)

66% (2008)

59% (1996)

51% (1991)

56% (2011)

0% (1970)

52% (2018)

55% (2016)

66% (2018)

48% (2012)

50% (2010)

62% (2015)

0% (2013)

68% (2014)

65% (2000)

59% (2018)

52% (2013)

54% (2009)