48% (1970)

44% (1980)

63% (1986)

53% (1985)

56% (1975)

10% (1976)

51% (1982)

69% (1977)

56% (1988)

57% (1984)

44% (2009)

65% (1979)

63% (1974)

43% (1988)

68% (1988)

54% (1983)

60% (2004)

60% (2018)

56% (2010)

29% (1966)