Year	Number
2008-01-01	5.9062
2009-01-01	16.5906
2010-01-01	7.8035
2011-01-01	13.6866
2012-01-01	18.3629
2013-01-01	21.9387
2014-01-01	21.7100
2015-01-01	21.4658
2016-01-01	23.3510
2017-01-01	28.9046