DDC Dataset Statistics

Last updated: 2026-08-19 16:23:00 (UTC+8)

This is a repository for the statistics of the DDC dataset. The statistics are autoly generated by the github action every three days.

Statistics

DDC data distribution

DDC that already having 50 samples will not show details of the distribution.

Vaild samples number in total: 269475

DDC number that not satisfy the requirement of 50 samples have: 284

DDC grouped by 10 (count of DDC < 50):

DDC Range	DDC < 50 Count	DDC List
000-007	2	000, 007
010-019	7	012, 013, 014, 015, 017, 018, 019
020-029	2	024, 029
030-039	5	030, 033, 034, 036, 039
050-059	6	050, 051, 052, 054, 055, 059
060-069	10	060, 061, 062, 063, 064, 065, 066, 067, 068, 069
070-079	6	071, 072, 073, 074, 077, 079
080-089	8	080, 081, 082, 084, 085, 086, 087, 089
091-099	4	091, 093, 098, 099
100-109	3	100, 102, 104
110-119	3	112, 118, 119
120-129	2	125, 127
130-139	4	132, 134, 137, 139
140-149	3	143, 145, 148
150-159	5	151, 154, 156, 157, 159
160-169	6	160, 162, 164, 166, 168, 169
170-179	5	171, 172, 175, 177, 178
180-189	9	180, 182, 183, 184, 185, 186, 187, 188, 189
190-199	6	190, 191, 195, 197, 198, 199
210-219	4	216, 217, 218, 219
220-229	4	220, 221, 222, 225
230-239	1	237
240-249	1	245
270-279	1	278
280-289	1	288
290-299	2	290, 298
310-319	4	311, 312, 313, 318
360-369	1	360
390-399	3	396, 397, 399
400-409	1	406
430-439	4	431, 432, 435, 437
440-449	4	441, 442, 445, 449
450-459	6	450, 452, 455, 457, 458, 459
460-469	6	460, 462, 465, 467, 468, 469
470-479	6	470, 472, 475, 477, 478, 479
480-489	7	480, 481, 482, 483, 485, 487, 488
490-499	9	490, 491, 492, 493, 494, 496, 497, 498, 499
520-529	1	527
540-549	1	545
550-559	1	553
560-569	1	562
580-589	1	586
650-659	1	655
670-679	3	673, 675, 679
680-689	3	680, 681, 689
690-699	1	699
700-709	1	705
710-719	7	710, 713, 714, 715, 716, 718, 719
730-739	1	734
740-749	1	742
750-759	2	753, 754
760-769	6	762, 763, 764, 765, 766, 767
770-779	3	772, 773, 774
780-789	2	785, 789
800-809	6	802, 803, 804, 805, 806, 807
810-819	4	812, 815, 816, 817
820-829	5	824, 825, 826, 827, 829
830-839	10	830, 831, 832, 833, 834, 835, 836, 837, 838, 839
840-849	7	841, 842, 844, 845, 846, 848, 849
850-859	8	850, 851, 852, 853, 854, 856, 858, 859
860-869	7	860, 861, 862, 863, 864, 868, 869
870-879	10	870, 871, 872, 873, 874, 875, 876, 877, 878, 879
880-889	10	880, 881, 882, 883, 884, 885, 886, 887, 888, 889
890-899	8	890, 892, 893, 894, 896, 897, 898, 899
900-909	3	905, 906, 908
910-919	1	912
920-929	4	922, 924, 925, 926
960-969	1	969
990-999	3	991, 992, 999

DDC number that not satisfy the requirement of 50 samples:

DDC	Sample Number
055	10
066	10
077	10
079	10
168	10
198	10
199	10
397	10
480	10
498	10
766	10
773	10
807	10
845	10
853	10
869	10
874	10
879	10
881	10
924	10
991	10
992	10
019	11
054	11
059	11
064	11
072	11
085	11
093	11
399	11
827	11
837	11
844	11
886	11
898	11
033	12
067	12
073	12
074	12
082	12
125	12
450	12
469	12
553	12
586	12
680	12
699	12
805	12
806	12
852	12
861	12
065	13
080	13
178	13
182	13
222	13
313	13
472	13
478	13
479	13
836	13
850	13
856	13
864	13
877	13
906	13
007	14
014	14
034	14
039	14
062	14
183	14
187	14
221	14
713	14
834	14
846	14
849	14
870	14
887	14
905	14
084	15
099	15
151	15
180	15
217	15
455	15
718	15
765	15
838	15
859	15
875	15
876	15
897	15
036	16
468	16
485	16
762	16
774	16
803	16
832	16
835	16
842	16
086	17
091	17
118	17
127	17
143	17
159	17
184	17
189	17
195	17
457	17
475	17
477	17
490	17
494	17
496	17
689	17
826	17
873	17
885	17
894	17
060	18
068	18
098	18
139	18
145	18
162	18
188	18
219	18
225	18
460	18
465	18
481	18
754	18
817	18
830	18
858	18
888	18
896	18
061	19
197	19
288	19
396	19
458	19
470	19
482	19
487	19
488	19
734	19
802	19
829	19
872	19
890	19
893	19
156	20
499	20
878	20
081	21
157	21
175	21
216	21
311	21
467	21
899	21
119	22
134	22
298	22
459	22
493	22
815	22
854	22
862	22
071	23
785	23
804	23
816	23
831	23
868	23
871	23
889	23
013	24
089	24
164	24
185	24
432	24
435	24
050	25
063	25
087	25
177	25
237	25
497	25
767	25
884	25
000	26
166	26
186	26
527	26
112	27
154	27
100	28
220	28
679	28
715	28
719	28
764	28
908	28
922	28
191	29
705	29
860	29
437	30
882	30
160	31
441	32
716	32
824	32
012	33
825	33
018	34
148	34
169	34
462	34
675	34
714	34
763	34
137	35
839	35
017	36
069	36
491	36
492	36
753	36
848	36
029	37
171	38
710	38
925	38
278	39
312	39
452	39
545	39
681	39
772	39
833	39
999	39
104	40
483	40
841	40
863	40
926	40
024	41
742	41
851	41
883	41
190	42
218	42
290	42
449	42
789	42
102	43
172	43
360	43
445	43
655	43
051	44
318	44
406	44
431	44
052	45
880	45
030	46
132	46
245	46
562	47
812	47
912	48
015	49
442	49
673	49
892	49
969	49

DDC data quality

Garbled text by DDC group:

DDC Range	Total Records	Garbled Records	Garbled Ratio	Clean Records
000-007	7153	7	0.10%	7146
010-019	537	6	1.12%	531
020-029	1008	19	1.88%	989
030-039	297	10	3.37%	287
050-059	150	4	2.67%	146
060-069	186	10	5.38%	176
070-079	442	1	0.23%	441
091-099	143	3	2.10%	140
100-109	805	14	1.74%	791
110-119	964	23	2.39%	941
120-129	1351	49	3.63%	1302
130-139	1007	22	2.18%	985
140-149	1016	28	2.76%	988
150-159	6365	13	0.20%	6352
160-169	237	5	2.11%	232
180-189	319	1	0.31%	318
200-209	1901	48	2.52%	1853
210-219	1013	17	1.68%	996
220-229	1191	14	1.18%	1177
230-239	1467	13	0.89%	1454
240-249	1052	2	0.19%	1050
250-259	1000	13	1.30%	987
260-269	1120	22	1.96%	1098
270-279	1011	25	2.47%	986
280-289	947	25	2.64%	922
290-299	1432	13	0.91%	1419
300-309	4859	12	0.25%	4847
310-319	724	11	1.52%	713
320-329	19789	23	0.12%	19766
330-339	30775	21	0.07%	30754
340-349	5435	42	0.77%	5393
350-359	9204	38	0.41%	9166
360-369	2836	29	1.02%	2807
370-379	2850	30	1.05%	2820
380-389	2645	24	0.91%	2621
390-399	1222	19	1.55%	1203
400-409	1129	20	1.77%	1109
410-419	1824	1	0.05%	1823
420-429	1680	11	0.65%	1669
430-439	559	3	0.54%	556
440-449	769	5	0.65%	764
450-459	411	2	0.49%	409
460-469	452	3	0.66%	449
470-479	284	2	0.70%	282
480-489	286	1	0.35%	285
500-509	12395	15	0.12%	12380
510-519	2499	24	0.96%	2475
520-529	4308	21	0.49%	4287
530-539	1758	23	1.31%	1735
540-549	1281	16	1.25%	1265
550-559	1575	5	0.32%	1570
560-569	1280	13	1.02%	1267
570-579	11834	11	0.09%	11823
590-599	1474	1	0.07%	1473
600-609	928	17	1.83%	911
610-619	14690	8	0.05%	14682
620-629	12463	7	0.06%	12456
630-639	1657	10	0.60%	1647
650-659	5746	9	0.16%	5737
690-699	1122	3	0.27%	1119
700-709	2580	28	1.09%	2552
710-719	693	14	2.02%	679
720-729	2012	14	0.70%	1998
730-739	1261	14	1.11%	1247
740-749	2341	23	0.98%	2318
750-759	1296	9	0.69%	1287
760-769	413	4	0.97%	409
770-779	1396	27	1.93%	1369
780-789	1888	24	1.27%	1864
790-799	30772	72	0.23%	30700
800-809	2689	4	0.15%	2685
810-819	1539	3	0.19%	1536
820-829	2541	2	0.08%	2539
830-839	201	1	0.50%	200
880-889	235	1	0.43%	234
890-899	494	4	0.81%	490
910-919	1191	2	0.17%	1189
930-939	1581	1	0.06%	1580
950-959	1996	3	0.15%	1993
970-979	1759	1	0.06%	1758
980-989	846	1	0.12%	845

Minimal length of description: 15

Maximal length of description: 1286

Average length of description: 98.02