Year	Number
2004-01-01	48488
2005-01-01	52654
2006-01-01	55555
2007-01-01	57781
2008-01-01	60174
2009-01-01	60597
2010-01-01	61971
2011-01-01	59600
2012-01-01	59100
2013-01-01	65000
2014-01-01	65992
2015-01-01	66433
2016-01-01	67992
2017-01-01	70228