Year	Number
2004-01-01	134234.000000000
2005-01-01	163072.000000000
2006-01-01	310004.000000000
2007-01-01	331234.000000000
2008-01-01	363747.000000000
2009-01-01	392106.000000000
2010-01-01	456848.000000000
2011-01-01	540436.000000000
2012-01-01	580618.000000000
2013-01-01	525928.000000000
2014-01-01	481500.416666667