Year	Number
2004-01-01	248.1370
2005-01-01	254.5380
2006-01-01	259.0824
2007-01-01	263.6791
2008-01-01	269.1228
2009-01-01	271.0479
2010-01-01	324.7307
2011-01-01	463.8325
2012-01-01	532.1845
2013-01-01	511.9318
2014-01-01	519.9653
2015-01-01	560.5795
2016-01-01	595.7053