order  yield
 1      68.5
 2      73.1
 3      67.1
 4      74.2
 5      73.6
 6      68.5
 7      69.0
 8      76.4
 9      75.6
10      75.0
11      76.2
12      78.3
13      70.1
14      69.5
15      77.2
16      77.1
17      67.2
18      70.3
19      76.1
20      75.2
21      75.1
22      75.3
23      75.0
24      71.0
25      71.2
26      67.6
27      71.2
28      75.1
29      72.6
30      69.7