73% (1971)

55% (1984)

71% (1971)

48% (1980)

68% (1984)

53% (1983)

66% (1979)

30% (1992)

10% (2000)

100% (2004)

70% (1981)

10% (1999)

40% (1992)

25% (1992)

52% (1974)

40% (2004)

30% (1991)

0% (1974)

34% (1984)

44% (1997)