Year	Number
2005-01-01	38.6606
2006-01-01	43.4483
2007-01-01	48.3827
2008-01-01	50.5018
2009-01-01	48.1465
2010-01-01	49.3397
2011-01-01	52.0618
2012-01-01	52.5576
2013-01-01	54.4669
2014-01-01	58.7161
2015-01-01	59.4673
2016-01-01	60.3773