Year	Number
2004-01-01	52712129
2005-01-01	54854062
2006-01-01	65154372
2007-01-01	70283173
2008-01-01	72517173
2009-01-01	58841535
2010-01-01	61504849
2011-01-01	60609059
2012-01-01	58615749
2013-01-01	59043996
2014-01-01	61826393
2015-01-01	63369912
2016-01-01	65792461