70% (1988)

60% (1986)

0% (1979)

0% (1987)

0% (1980)

60% (1983)

38% (1998)

60% (1977)

90% (1963)

48% (1971)

75% (1999)

0% (1992)

70% (1979)

50% (1989)

50% (2000)

47% (2004)

52% (1989)

0% (1950)

0% (1958)

75% (1970)