Year	Number
2004-01-01	57
2005-01-01	71
2006-01-01	127
2007-01-01	195
2008-01-01	155
2009-01-01	146
2010-01-01	110
2011-01-01	172
2012-01-01	222
2013-01-01	215
2014-01-01	256
2015-01-01	274
2016-01-01	248
2017-01-01	233