68% (1984)

58% (1982)

70% (1995)

68% (1993)

66% (1964)

76% (2015)

67% (2007)

61% (1972)

82% (2010)

79% (1988)

68% (1983)

50% (2012)

72% (2005)

51% (2002)

75% (2013)

57% (2015)

59% (2002)

95% (2013)

58% (2001)

35% (2000)