TABLE 1.

Similarity of different grades of RAS.

Sample	Similarity	Sample	Similarity
1	0.979	16	0.997
2	0.988	17	0.871
3	0.985	18	0.991
4	0.993	19	0.954
5	0.983	20	0.983
6	0.994	21	0.986
7	0.982	22	0.981
8	0.973	23	0.996
9	0.990	24	0.994
10	0.969	25	0.979
11	0.969	26	0.981
12	0.994	27	0.991
13	0.933	28	0.992
14	0.978	29	0.982
15	0.980	30	0.963