Year	Number
2004-01-01	50.9423
2005-01-01	83.1237
2006-01-01	159.5248
2007-01-01	191.9201
2008-01-01	290.8460
2009-01-01	372.6614
2010-01-01	506.2243
2011-01-01	588.3913
2012-01-01	633.5423
2013-01-01	841.5461
2014-01-01	1061.1168
2015-01-01	1270.2619
2016-01-01	1442.0316