72% (1999)

60% (1998)

54% (1994)

78% (1985)

72% (1988)

69% (2002)

60% (1990)

0% (1992)

52% (2006)

0% (1977)

67% (2000)

0% (1992)

0% (1983)

0% (1987)

0% (1980)

56% (1996)

17% (1978)

70% (1992)