The page shows only babies born in the United States, and excludes all inductions.
| Month | # samples | 2/3 Range | Average |
|---|---|---|---|
| January | 738 | 266-286 | 276 |
| February | 645 | 270-286 | 277.1 |
| March | 640 | 269-286 | 277.3 |
| April | 637 | 269-286 | 277.6 |
| May | 636 | 268-286 | 277.2 |
| June | 692 | 270-286 | 277.8 |
| July | 640 | 270-287 | 278.3 |
| August | 611 | 268-287 | 277.5 |
| September | 662 | 269-286 | 277.6 |
| October | 630 | 270-287 | 278.1 |
| November | 586 | 267-287 | 277.4 |
| December | 596 | 268-287 | 276.9 |