| Year |
Mean Method |
Median Method |
Jackknife Method |
| 1 |
−0.37 |
−0.20 |
−0.38 |
| 2 |
0.24 |
0.41 |
0.25 |
| 3 |
−0.29 |
−0.13 |
−0.30 |
| 4 |
−0.26 |
−0.09 |
−0.27 |
| 5 |
−0.29 |
−0.13 |
−0.30 |
| 6 |
−0.58 |
−0.41 |
−0.60 |
| 7 |
−0.54 |
−0.38 |
−0.56 |
| 8 |
−0.38 |
−0.22 |
−0.39 |
| 9 |
−0.50 |
−0.33 |
−0.52 |
| 10 |
−0.21 |
−0.04 |
−0.22 |
| 11 |
0.38 |
0.55 |
−0.39 |
| 12 |
0.16 |
0.33 |
0.17 |
| 13 |
1.01 |
1.18 |
1.04 |
| 14 |
−0.25 |
−0.08 |
−0.26 |
| 15 |
−0.11 |
0.05 |
−0.11 |
| 16 |
0.19 |
0.36 |
0.2 |
| 17 |
0.16 |
0.33 |
0.17 |
| 18 |
0.32 |
0.48 |
0.33 |
| 19 |
0.55 |
0.72 |
0.57 |
| 20 |
0.67 |
0.84 |
0.69 |
| 21 |
0.74 |
0.91 |
0.77 |
| 22 |
−0.4 |
−0.23 |
−0.41 |
| 23 |
0.67 |
0.84 |
0.69 |
| 24 |
0.45 |
0.62 |
0.47 |
| 25 |
1 |
1.17 |
1.03 |
| 26 |
−0.54 |
−0.38 |
−0.56 |
| 27 |
−0.7 |
−0.53 |
−0.72 |
| 28 |
−0.58 |
−0.41 |
−0.6 |
| 29 |
−0.41 |
−0.24 |
−0.42 |
| 30 |
−0.12 |
0.05 |
−0.12 |