77% (1962)

60% (1972)

51% (1969)

50% (2015)

58% (1972)

68% (1960)

62% (1977)

73% (2007)

48% (1973)

62% (1960)

0% (1969)

52% (1974)

48% (1990)

58% (1967)

52% (2006)

40% (1964)

0% (1970)

58% (2008)

50% (1973)

44% (1970)