77% (2005)

66% (2012)

67% (2007)

70% (1991)

80% (1986)

51% (1999)

76% (2016)

76% (2007)

66% (1981)

68% (1980)

69% (2010)

68% (2006)

64% (1987)

64% (1992)

74% (2008)

60% (2002)

15% (1989)

27% (1984)

68% (2009)

60% (1998)