Historical Statistics of the United States Millennial Edition Online

		Df1021	Df1022	Df1023
		Total	Specially protected	Eliminated during year by separation of grades
Row	Year	Number	Number	Number
1	1925	233,633	27,241	----
2	1926	235,158	27,927	195
3	1927	236,283	28,724	245
4	1928	240,089	29,215	270
5	1929	242,809	30,190	275

6	1930	240,673	30,287	403
7	1931	238,017	31,052	361
8	1932	237,035	30,809	189
9	1933	235,827	30,628	221
10	1934	234,820	30,226	231

11	1935	234,231	30,200	164
12	1936	232,902	30,466	521
13	1937	232,322	31,119	400
14	1938	231,400	31,448	235
15	1939	231,104	31,775	204

16	1940	230,285	32,421	209
17	1941	229,722	32,859	182
18	1942	227,496	33,075	149
19	1943	226,938	33,124	37
20	1944	226,357	33,211	14

21	1945	226,153	33,321	7
22	1946	226,143	33,320	23
23	1947	226,501	33,789	24
24	1948	226,844	34,507	26
25	1949	226,791	35,243	53

26	1950	227,364	35,968	61
27	1951	227,415	36,682	50
28	1952	227,291	37,242	95
29	1953	227,110	37,990	53
30	1954	226,522	38,528	80

31	1955	226,318	39,060	84
32	1956	224,519	39,324	72
33	1957	223,381	39,884	113
34	1958	225,938	41,155	78
35	1959	225,394	41,720	130

36	1960	224,513	42,267	102
37	1961	223,735	42,256	100
38	1962	221,653	43,127	132
39	1963	220,165	43,484	72
40	1964	218,723	43,990	159

41	1965	215,961	44,333	59
42	1966	214,417	44,432	173
43	1967	218,723	45,213	132
44	1968	211,993	45,502	207
45	1969	211,740	45,961	49

46	1970	210,954	46,674	95
47	1971	210,640	47,440	118
48	1972	209,780	48,335	28
49	1973	208,469	48,821	151
50	1974	209,468	49,436	106

51	1975	210,074	50,170	49