Year	Number
2004-01-01	160.6615
2005-01-01	160.5505
2006-01-01	160.4228
2007-01-01	160.6522
2008-01-01	160.8043
2009-01-01	162.2028
2010-01-01	163.9205
2011-01-01	167.9671
2012-01-01	171.7116
2013-01-01	172.0711
2014-01-01	171.1733
2015-01-01	166.1348
2016-01-01	154.8476