200706 | 200806 | 200906 | 201006 | 201106 | 201206 | |
Mean | 5.785305 | 1.201762 | 3.245671 | 2.730351 | 4.351338 | 3.095427 |
Standard Deviation | 3.111368 | 1.595238 | 1.499056 | 1.700012 | 1.973207 | 1.631001 |