70% (1988)

70% (1974)

40% (1977)

52% (1986)

60% (1975)

13% (1992)

42% (1970)

0% (1999)

56% (1994)

50% (1951)

40% (1960)

50% (1975)

0% (1973)

39% (1989)

60% (1991)

20% (1980)

60% (1951)

52% (1988)

0% (1950)

0% (1973)