Year	Number
2004-01-01	57.3770
2005-01-01	57.3770
2006-01-01	60.6557
2007-01-01	67.2131
2008-01-01	67.2131
2009-01-01	63.9344
2010-01-01	96.7213
2011-01-01	101.6393
2012-01-01	104.9180
2013-01-01	104.9180
2014-01-01	103.2787
2015-01-01	103.2787
2016-01-01	88.5246
2017-01-01	103.2787