Year	Number
2004-01-01	13.3916
2005-01-01	10.5837
2006-01-01	12.9089
2007-01-01	9.4048
2008-01-01	51.4784
2009-01-01	29.9810
2010-01-01	36.3972
2011-01-01	31.3296
2012-01-01	23.4680
2013-01-01	57.9166
2014-01-01	47.2612