year month day data error
2010	9	1	5.65 	0.00 
2010	10	19	38.66 	0.00 
2010	11	4	83.19 	0.16 
2010	12	3	72.75 	0.05 
2011	1	25	58.60 	0.01 
2011	2	15	52.98 	0.39 
2011	5	9	512.31 	2.04 
2011	6	11	1541.33 	6.66 
2011	8	11	3649.09 	13.98