Year	Number
2004-01-01	651
2005-01-01	693
2006-01-01	754
2007-01-01	801
2008-01-01	787
2009-01-01	776
2010-01-01	750
2011-01-01	473
2012-01-01	474
2013-01-01	442
2014-01-01	392
2015-01-01	348
2016-01-01	316
2017-01-01	316