Year	Number
2005-01-01	532
2006-01-01	1426
2007-01-01	3676
2008-01-01	7278
2009-01-01	9907
2010-01-01	9958
2011-01-01	10865
2012-01-01	10727
2013-01-01	12755
2014-01-01	15935
2015-01-01	16406
2016-01-01	17398