51% (1985)

50% (1981)

65% (1979)

52% (1982)

59% (2014)

55% (2022)

72% (2010)

60% (1982)

52% (1977)

52% (1986)

70% (2013)

58% (1985)

65% (1983)

55% (1976)

58% (1971)

61% (2006)

60% (1983)

71% (1961)

61% (2022)

63% (2013)