Year Number 2004-01-01 0.715213777297158 2005-01-01 2.282082747395380 2006-01-01 2.773176016069780 2007-01-01 5.193314443487880 2008-01-01 5.755177903288150 2009-01-01 7.531179897966630 2010-01-01 9.291613250722340 2011-01-01 10.108832442504000 2012-01-01 6.587421441767000 2013-01-01 27.973097093888900