Year	Number
2004-01-01	2996.8321
2005-01-01	3017.4612
2006-01-01	3107.8125
2007-01-01	3347.2004
2008-01-01	3449.3410
2009-01-01	3423.4716
2010-01-01	3415.5540
2011-01-01	3532.0727
2012-01-01	3602.3287
2013-01-01	3663.6688
2014-01-01	3922.4641
2015-01-01	4085.7864
2016-01-01	4027.7959
2017-01-01	4173.9865