58% (2003)

80% (1995)

50% (1976)

68% (2002)

60% (1990)

71% (1996)

45% (2005)

60% (1990)

50% (1986)

30% (1998)

60% (1991)

80% (1980)

0% (1985)

72% (1977)

75% (1981)

75% (1991)

50% (1986)

67% (1969)

55% (1979)

72% (1976)