20% (1991)

20% (1970)

0% (1978)

45% (1997)

66% (1963)

0% (1977)

40% (1977)

43% (1975)

57% (1979)

0% (1979)

35% (1974)

20% (1976)

60% (1992)

40% (1979)

60% (1973)

0% (1976)

25% (1969)

65% (2005)

49% (1990)

20% (1973)