Year	Number
2008-01-01	5.25026805586323
2009-01-01	5.03000045423950
2010-01-01	5.54927096729025
2011-01-01	6.66765626560837
2012-01-01	8.01147837562495
2013-01-01	9.01232585776256
2014-01-01	11.46694164904630
2015-01-01	11.67155793513720