68% (2003)

43% (1987)

61% (1997)

68% (1983)

61% (1991)

62% (2008)

55% (1999)

61% (2013)

66% (1977)

60% (1990)

60% (1999)

63% (1982)

63% (2010)

59% (1992)

66% (2014)

56% (2023)

68% (1989)

58% (1980)

48% (2004)

60% (1979)