45% (1997)

35% (2004)

40% (2004)

48% (2009)

20% (1994)

100% (1990)

42% (1984)

53% (2003)

45% (1990)

15% (1991)

53% (2007)

35% (1987)

0% (1992)

35% (1979)

0% (1994)

45% (1992)

37% (1976)

47% (2005)

0% (1984)

20% (2000)