Year	Number
2004-01-01	103
2005-01-01	106
2006-01-01	112
2007-01-01	129
2008-01-01	141
2009-01-01	153
2010-01-01	164
2011-01-01	178
2012-01-01	195
2013-01-01	211
2014-01-01	249
2015-01-01	281
2016-01-01	311
2017-01-01	339