Year	Number
2004-01-01	149
2005-01-01	150
2006-01-01	139
2007-01-01	159
2008-01-01	163
2009-01-01	170
2010-01-01	184
2011-01-01	196
2012-01-01	216
2013-01-01	214
2014-01-01	206
2015-01-01	211
2016-01-01	215
2017-01-01	220