Year	Number
2004-01-01	41.0098
2005-01-01	40.1881
2006-01-01	39.6880
2007-01-01	39.3180
2008-01-01	38.8406
2009-01-01	38.1544
2010-01-01	37.8231
2011-01-01	37.4656
2012-01-01	36.9542
2013-01-01	36.1700
2014-01-01	35.2995
2015-01-01	33.9496
2016-01-01	31.9060
2017-01-01	29.2663