Year	Number
2004-01-01	341.9291
2005-01-01	341.7093
2006-01-01	336.1714
2007-01-01	377.3007
2008-01-01	423.4201
2009-01-01	488.6817
2010-01-01	488.4768
2011-01-01	455.1573
2012-01-01	557.0193
2013-01-01	600.9867
2014-01-01	618.8874
2015-01-01	608.8271
2016-01-01	583.1372