60% (1975)

63% (1984)

51% (2015)

45% (2001)

64% (1986)

65% (2014)

72% (1944)

61% (1986)

68% (2011)

59% (2006)

58% (1998)

50% (1995)

66% (1969)

52% (1993)

70% (1982)

71% (2015)

51% (1970)

43% (2010)

65% (1987)

61% (1989)