76% (1982)

63% (2002)

56% (1980)

50% (1979)

56% (1984)

59% (2009)

33% (2011)

51% (2010)

62% (2017)

41% (2011)

63% (2017)

57% (1984)

70% (1968)

40% (1993)

59% (2013)

88% (1979)

58% (2004)

64% (1995)

43% (1992)

60% (1973)