Year	Number
2004-01-01	151
2005-01-01	158
2006-01-01	160
2007-01-01	169
2008-01-01	175
2009-01-01	182
2010-01-01	184
2011-01-01	217
2012-01-01	217
2013-01-01	310
2014-01-01	334
2015-01-01	345
2016-01-01	402