Sec 66
No ID Grade/20
1 251583 15.8
2 251643 15.3
3 251959 13.5
4 253965 17.1
5 255307 11.7
6 255743 9.5
7 255931 16.6
8 256147 14.5
9 256459 15.3
10 257403 15.6
11 257963 15.7
12 258253 16.6
13 258591 13.8
14 258737 11.6
15 258767 10.7
16 259153 15.1
17 259587 12.0
18 259591 14.0
19 259871 11.6
Average 14.0
STD 2.2