| 2004 | 2008 | |||
|---|---|---|---|---|
| Number of workers (thousands) | Percent of workers | Number of workers (thousands) | Percent of workers | |
| 5:00 a.m. to 5:29 a.m. | 4,254 | 3.4 | 5,009 | 3.6 |
| 5:30 a.m. to 5:59 a.m. | 6,130 | 4.9 | 6,969 | 5.0 |
| 6:00 a.m. to 6:29 a.m. | 11,197 | 8.9 | 12,285 | 8.9 |
| 6:30 a.m. to 6:59 a.m. | 13,591 | 10.8 | 14,474 | 10.5 |
| 7:00 a.m. to 7:29 a.m. | 18,648 | 14.8 | 20,420 | 14.8 |
| 7:30 a.m. to 7:59 a.m. | 17,552 | 14.0 | 18,274 | 13.2 |
| 8:00 a.m. to 8:29 a.m. | 13,771 | 10.9 | 14,793 | 10.7 |
| 8:30 a.m. to 8:59 a.m. | 6,909 | 5.5 | 7,626 | 5.5 |
| 9:00 a.m. to 9:59 a.m. | 7,388 | 5.9 | 8,336 | 6.0 |
| 10:00 a.m. to 10:59 a.m. | 3,203 | 2.5 | 3,652 | 2.6 |
| 11:00 a.m. to 11:59 a.m. | 1,436 | 1.1 | 1,720 | 1.2 |
| 12:00 p.m. to 3:59 p.m. | 8,688 | 6.9 | 9,684 | 7.0 |
| 4:00 p.m. to 11:59 p.m. | 8,307 | 6.6 | 9,180 | 6.6 |
| 12:00 a.m. to 4:59 a.m. | 4,734 | 3.8 | 5,677 | 4.1 |
| Total | 125,808 | 100.0 | 138,099 | 100.0 |
NOTES: Percents may not add to 100 due to rounding. Workers are those aged 16 years and older who worked outside the home during the reference week and include members of the Armed Forces and civilians. For additional information, please refer to the American Community Surveys 2008 Subject Definitions, available at http://www.census.gov/acs/.
SOURCE: U.S. Department of Commerce, U.S. Census Bureau, American Community Survey (Washington, DC: Annual Issues), table B08011, available at http://www.census.gov/acs/www/index.html as of September 2009.