Year	Number
2004-01-01	6.9909
2005-01-01	11.7221
2006-01-01	14.2024
2007-01-01	15.0367
2008-01-01	18.4064
2009-01-01	18.4777
2010-01-01	21.1529
2011-01-01	21.6994
2012-01-01	25.0797
2013-01-01	26.1244
2014-01-01	31.6036
2015-01-01	31.2481
2016-01-01	31.1584