50% (2007)

25% (1999)

62% (2010)

0% (1985)

38% (2006)

70% (1989)

30% (2008)

30% (2003)

49% (2010)

69% (2001)

60% (2012)

52% (2010)

60% (2005)

0% (1987)

38% (2005)

43% (2000)

35% (2004)

20% (1991)

5% (2009)

0% (1970)