92% (2003)

50% (1987)

56% (1982)

40% (1990)

0% (2001)

98% (1994)

50% (1978)

75% (1975)

50% (1986)

50% (1972)

70% (1977)

73% (1977)

50% (1985)

60% (2007)

0% (2002)

60% (1985)

0% (1997)

50% (1982)

0% (1996)

0% (1979)