Year	Number
2004-01-01	71.8081
2005-01-01	81.3581
2006-01-01	92.4516
2007-01-01	119.6410
2008-01-01	124.2930
2009-01-01	121.9447
2010-01-01	121.7467
2011-01-01	133.2046
2012-01-01	145.1145
2013-01-01	156.4378
2014-01-01	165.1826
2015-01-01	175.9039
2016-01-01	180.7531
2017-01-01	196.8628