Year	Number
2004-01-01	1239
2005-01-01	1235
2006-01-01	1274
2007-01-01	1263
2008-01-01	1226
2009-01-01	1172
2010-01-01	1159
2011-01-01	1159
2012-01-01	998
2013-01-01	918
2014-01-01	848
2015-01-01	699
2016-01-01	509