Year	Number
2004-01-01	34.6058
2005-01-01	34.3843
2006-01-01	34.1154
2007-01-01	33.8989
2008-01-01	33.8494
2009-01-01	33.8160
2010-01-01	33.8183
2011-01-01	33.8998
2012-01-01	33.9459
2013-01-01	33.9049
2014-01-01	33.8914
2015-01-01	34.1409
2016-01-01	34.1043
2017-01-01	33.9894