Table 1. Population by Response Category.
*Source: Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2013 [17].
| Response Category | Number of States | Population* | Population as % of US Population |
| Total available for research (data includes address and weight) | 14 | 89,751,141 | 28.4% |
| Data received | 7 | 62,082,353 | 19.6% |
| Data available, not acquired due to data fee | 3 | 5,410,547 | 1.7% |
| Data approved, in queue for programming | 3 | 10,687,433 | 3.4% |
| Data available for research, specific approval pending | 1 | 11,570,808 | 3.7% |
| Total data not available | 19 | 108,391,142 | 34.3% |
| Does not allow research use | 13 | 81,142,793 | 25.7% |
| Does not provide/declined request /unable to process | 6 | 27,248,349 | 8.6% |
| Zip code only | 4 | 11,775,228 | 3.7% |
| Weight not recorded | 7 | 74,097,334 | 23.4% |
| No response | 7 | 32,113,994 | 10.2% |
| Total (including the District of Columbia) | 51 | 312,513,753 | 100% |