Year	Number
2007-01-01	1.409605316
2008-01-01	3.505590714
2009-01-01	4.056255641
2010-01-01	4.833607967
2011-01-01	6.103637097
2012-01-01	7.514408264
2013-01-01	9.662431427
2014-01-01	9.873812713