Year	Number
2004-01-01	41.3251
2005-01-01	45.2208
2006-01-01	52.6266
2007-01-01	46.7363
2008-01-01	70.3152
2009-01-01	85.4987
2010-01-01	98.9115
2011-01-01	112.6270
2012-01-01	118.7338
2013-01-01	133.4712
2014-01-01	146.2806
2015-01-01	163.2084