58% (2003)

49% (2006)

72% (2006)

0% (2008)

80% (2009)

80% (2001)

40% (2005)

62% (1998)

42% (2011)

0% (2006)

100% (2010)

0% (2008)

80% (2006)

0% (2003)

0% (2011)

0% (2004)

0% (2011)