Subgroup	Diameter_mm
1	20.0169
1	20.0022
1	20.0166
1	20.0112
1	20.0062
2	19.9932
2	20.0073
2	20.0103
2	20.0226
2	20.0037
3	20.0055
3	19.9993
3	20.0018
3	20.0111
3	20.0137
4	19.9678
4	20.0041
4	19.9923
4	19.9959
4	19.9981
5	19.9984
5	20.0093
5	20.0106
5	19.9928
5	19.9939
6	19.9971
6	19.9941
6	20.0132
6	20.0013
6	19.9945
7	19.9930
7	20.0241
7	20.0225
7	19.9928
7	19.9965
8	19.9753
8	20.0010
8	19.9961
8	20.0036
8	19.9929
9	20.0025
9	20.0054
9	20.0093
9	19.9763
9	20.0111
10	19.9997
10	20.0150
10	20.0124
10	20.0008
10	19.9829
11	19.9810
11	20.0061
11	19.9913
11	19.9988
11	20.0161
12	19.9925
12	19.9996
12	19.9963
12	19.9896
12	19.9851
13	20.0146
13	20.0179
13	19.9965
13	20.0047
13	19.9808
14	20.0135
14	19.9994
14	19.9972
14	19.9949
14	19.9844
15	20.0015
15	20.0028
15	19.9959
15	19.9945
15	19.9996
16	19.9903
16	20.0174
16	20.0078
16	19.9909
16	20.0010
17	20.0025
17	19.9721
17	20.0000
17	20.0091
17	19.9960
18	19.9846
18	20.0125
18	19.9864
18	20.0176
18	19.9990
19	19.9823
19	20.0154
19	19.9912
19	19.9948
19	20.0165
20	19.9943
20	19.9999
20	19.9979
20	20.0024
20	19.9860
21	20.0027
21	20.0053
21	19.9934
21	19.9905
21	19.9906
22	20.0214
22	20.0313
22	20.0260
22	20.0282
22	20.0127
23	20.0352
23	20.0396
23	20.0260
23	20.0413
23	20.0165
24	20.0002
24	20.0364
24	20.0384
24	20.0325
24	20.0314
25	20.0296
25	20.0295
25	20.0306
25	20.0346
25	20.0146