Year	Number
2004-01-01	78.4862
2005-01-01	82.6164
2006-01-01	81.6107
2007-01-01	57.9826
2008-01-01	62.3371
2009-01-01	69.0574
2010-01-01	68.3071
2011-01-01	74.8099
2012-01-01	76.3641
2013-01-01	96.7779
2014-01-01	91.0806
2015-01-01	92.4713
2016-01-01	89.2829
2017-01-01	89.2829