50% (1971)

36% (1977)

20% (1986)

69% (2011)

74% (1963)

60% (2015)

44% (2016)

64% (2003)

51% (1982)

74% (2008)

53% (1985)

65% (2014)

41% (1985)

59% (2008)

64% (1986)

66% (2020)

63% (1984)

64% (2018)

60% (1985)

67% (1980)