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Federal government websites often end in .gov or .mil. Before
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and transmitted securely.
Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1959 | 2 |
| 1961 | 1 |
| 1965 | 2 |
| 1966 | 2 |
| 1967 | 1 |
| 1968 | 4 |
| 1970 | 3 |
| 1971 | 3 |
| 1972 | 6 |
| 1973 | 4 |
| 1974 | 3 |
| 1975 | 3 |
| 1976 | 2 |
| 1977 | 2 |
| 1978 | 1 |
| 1979 | 1 |
| 1981 | 2 |
| 1984 | 1 |
| 1985 | 1 |
| 1987 | 2 |
| 1988 | 1 |
| 1991 | 1 |
| 1992 | 1 |
| 1993 | 2 |
| 1996 | 1 |
| 1999 | 1 |
| 2000 | 1 |
| 2002 | 2 |
| 2009 | 1 |
| 2015 | 1 |
| 2023 | 1 |
| 2024 | 1 |