Year	Number
2004-01-01	350
2005-01-01	374
2006-01-01	420
2007-01-01	485
2008-01-01	567
2009-01-01	626
2010-01-01	644
2011-01-01	666
2012-01-01	655
2013-01-01	700
2014-01-01	752
2015-01-01	750