Year Number per 1,000 adults 2005-01-01 178.14700000000002 2006-01-01 208.76800000000000 2007-01-01 220.13000000000000 2008-01-01 247.32400000000000 2009-01-01 271.78800000000000 2010-01-01 282.92000000000000 2011-01-01 346.30600000000000 2012-01-01 455.46100000000000 2013-01-01 456.35100000000000 2014-01-01 501.15800000000000 2015-01-01 595.37000000000000 2016-01-01 554.72800000000010