Year	Number
2004-01-01	54.7587
2005-01-01	57.0107
2006-01-01	83.8693
2007-01-01	71.1116
2008-01-01	90.2455
2009-01-01	86.4587
2010-01-01	97.1995
2011-01-01	124.3268
2012-01-01	154.4043
2013-01-01	143.8800
2014-01-01	145.7134
2015-01-01	137.5683
2016-01-01	142.7013