Year	Number
2007-01-01	15121.8269
2008-01-01	20599.6213
2009-01-01	18862.8570
2010-01-01	15595.3669
2011-01-01	14923.3401
2012-01-01	15270.9715
2013-01-01	14239.9250
2014-01-01	14303.4436
2015-01-01	13264.9122
2016-01-01	11942.1654
2017-01-01	7969.7226