Year	Number
2004-01-01	276.9581
2005-01-01	496.9411
2006-01-01	524.4723
2007-01-01	572.8688
2008-01-01	598.1438
2009-01-01	672.7610
2010-01-01	701.9917
2011-01-01	733.2162
2012-01-01	1018.9197
2013-01-01	1683.1634
2014-01-01	1649.5302
2015-01-01	1709.6860
2016-01-01	1735.9600