55% (1986)

66% (1994)

49% (1974)

58% (2010)

42% (1982)

52% (1973)

51% (1966)

51% (1965)

64% (2014)

58% (2009)

65% (2006)

62% (2011)

61% (1981)

48% (2007)

55% (2008)

36% (1969)

67% (1972)

66% (1986)

54% (1985)

59% (1994)