70% (1978)

67% (1997)

68% (2000)

50% (1980)

67% (1999)

52% (2004)

66% (1994)

0% (1978)

67% (1999)

87% (1980)

60% (1991)

50% (1983)

52% (1986)

55% (1988)

0% (1978)

0% (1976)

60% (1996)

20% (1980)

62% (1977)

58% (1979)