Year	Number
2009-01-01	36.6021
2010-01-01	35.9800
2011-01-01	33.9717
2012-01-01	33.4104
2013-01-01	32.8677
2014-01-01	29.6464
2015-01-01	27.8577
2016-01-01	27.4474
2017-01-01	23.5263