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- Engineer Department✖[remove]9,191
- War Department7,925
- Northern and Northwestern Lake Survey1,163
- Mississippi River Commission250
- Treasury Department234
- Rivers and Harbors Board180
- Army Dept.107
- War Dept.105
- Public Buildings and Grounds Office45
- Finance Department44
- 1890 - 1899556
- 1900 - 19091,007
- 1910 - 19192,525
- 1920 - 19291,273
- 1930 - 19391,482
- 1940 - 19491,237
- 1950 - 19596
- 1890 - 1899549
- 1900 - 19091,035
- 1910 - 19192,463
- 1920 - 19291,280
- 1930 - 19391,527
- 1940 - 19491,207
- 1950 - 195921