62% (2019)

63% (2014)

68% (1991)

51% (1994)

62% (1983)

65% (1995)

62% (2000)

44% (1997)

70% (1956)

61% (1981)

67% (1975)

66% (1964)

53% (1994)

52% (1986)

58% (1990)

67% (1994)

71% (1993)

60% (1982)

60% (1996)

72% (1995)