Year	Number
2004-01-01	31004
2005-01-01	38519
2006-01-01	52791
2007-01-01	54777
2008-01-01	58893
2009-01-01	66716
2010-01-01	81580
2011-01-01	112855
2012-01-01	109607
2013-01-01	114553
2014-01-01	116410
2015-01-01	131407
2016-01-01	141645