Year	Number
2004-01-01	8.1876
2005-01-01	8.0580
2006-01-01	13.6110
2007-01-01	34.8343
2008-01-01	34.1472
2009-01-01	43.2319
2010-01-01	44.6977
2011-01-01	47.0711
2012-01-01	47.5703
2013-01-01	49.2354
2014-01-01	52.8324
2015-01-01	53.9819
2016-01-01	54.6497