Year	Number
2004-01-01	32.6101
2005-01-01	31.9452
2006-01-01	47.4823
2007-01-01	50.8719
2008-01-01	50.4676
2009-01-01	49.7772
2010-01-01	49.5749
2011-01-01	150.1382
2012-01-01	200.9426
2013-01-01	262.4206
2014-01-01	249.6684
2015-01-01	240.0373
2016-01-01	301.8210