Year Number per 100,000 adults 2004-01-01 21.781500000000000 2005-01-01 21.705000000000000 2006-01-01 21.649800000000000 2007-01-01 21.606200000000000 2008-01-01 21.568500000000000 2009-01-01 21.521600000000000 2010-01-01 21.458000000000002 2011-01-01 21.374800000000000 2012-01-01 21.278100000000000 2013-01-01 21.173500000000000 2014-01-01 19.308200000000000 2015-01-01 19.206900000000000 2016-01-01 17.370300000000000