Year	Number
2004-01-01	30
2005-01-01	31
2006-01-01	43
2007-01-01	88
2008-01-01	123
2009-01-01	133
2010-01-01	143
2011-01-01	156
2012-01-01	162
2013-01-01	170
2014-01-01	189
2015-01-01	211
2016-01-01	234