Year	Number
2004-01-01	6861126
2005-01-01	7057842
2006-01-01	5654337
2007-01-01	6631637
2008-01-01	7515924
2009-01-01	2534331
2010-01-01	2536583
2011-01-01	2156012
2012-01-01	2373771
2013-01-01	2759409
2014-01-01	2954822
2015-01-01	2990171
2016-01-01	2847975
2017-01-01	2620074