Year	Number
2004-01-01	16.2303
2005-01-01	11.3296
2006-01-01	13.4767
2007-01-01	18.4247
2008-01-01	21.7471
2009-01-01	23.6397
2010-01-01	26.2251
2011-01-01	30.4380
2012-01-01	35.0148
2013-01-01	41.0865
2014-01-01	50.5401
2015-01-01	50.1756
2016-01-01	59.4203