81% (1993)

67% (1984)

51% (2002)

68% (2014)

55% (1982)

60% (1989)

79% (2014)

69% (1998)

65% (1971)

74% (2000)

77% (2008)

61% (1995)

62% (2004)

68% (2009)

75% (2001)

68% (1989)

76% (1992)

82% (1984)

78% (2013)

70% (1975)