73% (2014)

68% (2018)

74% (1976)

67% (1992)

62% (2014)

74% (1990)

59% (1994)

64% (1978)

60% (2005)

66% (1994)

64% (2002)

64% (1999)

69% (1993)

49% (1991)

58% (1981)

62% (1997)

63% (2003)

58% (1981)

56% (1985)

60% (1980)