77% (2016)

78% (2013)

79% (2019)

73% (2015)

54% (2011)

64% (2015)

59% (2004)

62% (2014)

53% (1999)

62% (2016)

74% (2015)

0% (2005)

0% (2012)

32% (2004)

0% (1990)

50% (1990)

80% (2007)

50% (1987)

55% (2001)

66% (1979)