67% (2015)

68% (2002)

63% (1992)

52% (1991)

55% (1992)

59% (1980)

63% (1977)

50% (1976)

51% (1981)

58% (1994)

74% (1989)

69% (2010)

64% (2010)

58% (2019)

63% (1992)

60% (1984)

60% (2017)

71% (1988)

56% (1983)

68% (1994)