Notes: NA Not available; - Represents zero.
1. Data on naturalizations were first compiled by a single federal
agency with the establishment of the Naturalization Service in 1906. The
year 1907 includes naturalizations from September 27, 1906 to June
2. Data on military naturalizations prior to 1918 not available.
Special provisions for military naturalizations expired or suspended
in 1925 and 1935.
3. Includes the 15 months from July 1, 1975 to September 30, 1976
because the end date of fiscal years was changed from June 30 to September
Source: Department of Homeland Security, Office of Immigration
Statistics, Yearbook of Immigration Statistics (various years). Available at