71% (1971)

72% (1971)

55% (1984)

30% (1991)

48% (1980)

66% (1979)

68% (1984)

30% (1992)

100% (2004)

57% (1995)

53% (1983)

40% (1992)

32% (1995)

55% (2000)

73% (1973)

20% (2006)

20% (1999)

60% (1974)

50% (1999)

44% (1973)