Year	Number
2004-01-01	14.2472
2005-01-01	32.3422
2006-01-01	65.2835
2007-01-01	76.1809
2008-01-01	106.7355
2009-01-01	105.4895
2010-01-01	126.2756
2011-01-01	138.0937
2012-01-01	151.1359
2013-01-01	145.3734
2014-01-01	153.2582
2015-01-01	146.9390
2016-01-01	157.7979