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 30, 1907.

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 30.

Source: Department of Homeland Security, Office of Immigration Statistics, Yearbook of Immigration Statistics 2008. Available at http://www.dhs.gov/ximgtn/statistics/publications/LPR08.shtm.

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