53% (2009)

55% (2009)

32% (1998)

52% (2006)

28% (1991)

39% (1997)

29% (1988)

10% (2010)

24% (1990)

55% (1996)

28% (1979)

20% (2002)

49% (2005)

33% (1998)

10% (2012)

25% (1987)