Unique values of SIMPCODE

Value	Number of Occurrences
63	15038
44	12128
40	10636
60	9865
61	7979
41	5629
21	5097
62	4740
42	4492
50	4473
11	4207
10	3383
31	3321
70	2441
23	1862
43	1680
20	851
22	565
30	430
45	172
32	91