Year	Number
2004-01-01	0.034129949
2005-01-01	0.077772314
2006-01-01	0.195416696
2007-01-01	0.442231701
2008-01-01	0.771483394
2009-01-01	0.950593813
2010-01-01	1.021928931
2011-01-01	1.024696070