Year Number per 1,000 adults 2004-01-01 0.4829260900000000 2005-01-01 0.8016611900000000 2006-01-01 1.5617563000000000 2007-01-01 2.9794238999999996 2008-01-01 4.9618136000000000 2009-01-01 12.1646170000000000 2010-01-01 12.3183619999999990 2011-01-01 16.4062260000000000 2012-01-01 27.3624770000000020 2013-01-01 34.9511980000000000 2014-01-01 46.0277910000000000