Year	Number
2004-01-01	100.8295
2005-01-01	114.9538
2006-01-01	134.3190
2007-01-01	182.1796
2008-01-01	232.9357
2009-01-01	190.6581
2010-01-01	198.9793
2011-01-01	216.5799
2012-01-01	235.0181
2013-01-01	246.8842
2014-01-01	248.8653
2015-01-01	248.3444
2016-01-01	244.4269
2017-01-01	243.0442