Year	Number
2005-01-01	273.3118
2006-01-01	315.8487
2007-01-01	366.2671
2008-01-01	441.4098
2009-01-01	504.3927
2010-01-01	518.8238
2011-01-01	520.3427
2012-01-01	532.9533
2013-01-01	487.8455
2014-01-01	441.3226
2015-01-01	426.3703
2016-01-01	415.3848
2017-01-01	441.0106