| Depth | Mean | Max. | Min. | Number of Sample | Standard Deviation |
| 0 |
18.15 |
18.99 |
17.08 |
32 |
0.44 |
| 10 |
18.17 |
18.72 |
17.26 |
32 |
0.34 |
| 20 |
18.27 |
18.69 |
17.52 |
31 |
0.26 |
| 30 |
18.38 |
18.83 |
17.75 |
31 |
0.23 |
| 50 |
18.68 |
19.70 |
17.70 |
28 |
0.40 |
| 75 |
19.47 |
20.58 |
18.34 |
27 |
0.70 |
| 100 |
20.11 |
20.84 |
18.44 |
24 |
0.74 |
| 125 |
20.67 |
21.23 |
19.54 |
22 |
0.50 |
| 150 |
20.94 |
21.41 |
20.09 |
20 |
0.35 |
| 200 |
21.33 |
21.58 |
20.84 |
17 |
0.22 |
| 250 |
21.69 |
21.76 |
21.63 |
13 |
0.04 |
| 300 |
21.84 |
21.93 |
21.77 |
10 |
0.05 |
| 400 |
21.98 |
22.20 |
21.71 |
8 |
0.14 |
| 500 |
22.07 |
22.10 |
22.04 |
6 |
0.03 |
| 900 |
22.31 |
22.32 |
22.31 |
3 |
0.00 |
|
|