Year	Number
2004-01-01	16.1714
2005-01-01	17.7229
2006-01-01	17.5829
2007-01-01	18.9894
2008-01-01	21.3543
2009-01-01	25.9720
2010-01-01	33.3646
2011-01-01	37.5066
2012-01-01	30.8565