20% (1977)

50% (1981)

45% (1984)

50% (1957)

80% (1980)

70% (2004)

61% (1996)

73% (1981)

45% (1996)

70% (1988)

50% (1988)

0% (1970)

63% (1974)

56% (1973)

63% (1996)

60% (1960)

63% (1984)

50% (1964)

59% (1985)

50% (1980)