Year	Number
2004-01-01	165.7091
2005-01-01	167.3355
2006-01-01	164.6398
2007-01-01	165.1788
2008-01-01	165.1766
2009-01-01	166.3604
2010-01-01	166.2616
2011-01-01	172.3966
2012-01-01	179.8658
2013-01-01	185.9152
2014-01-01	189.7747
2015-01-01	193.0641
2016-01-01	201.7068