Popularity in the United States (by decade)
Numbers
| Tammy (feminine) | Tammy (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | - | - | - | - | ||
| 2010 | - | - | - | - | ||
| 2000 | #1386 | 0.008 | - | - | ||
| 1990 | #677 | 0.017 | - | - | ||
| 1980 | #181 | 0.085 | - | - | ||
| 1970 | #23 | 0.600 | #1289 | 0.003 | ||
| 1960 | #13 | 0.964 | #945 | 0.003 | ||
| 1950 | #140 | 0.148 | #1950 | 0.001 | ||
| 1940 | #1191 | 0.003 | - | - | ||
| 1930 | - | - | - | - | ||
| 1920 | - | - | - | - | ||
| 1910 | - | - | - | - | ||
| 1900 | - | - | - | - | ||
| 1890 | - | - | - | - | ||
| 1880 | - | - | - | - | ||
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