25, 27, 33, and 34 are presentations by population groups. The table on page 2 shows the summary of the population coverage and number of agencies represented. In 1997, data for the states of Florida, Illinois, Kansas, New Hampshire, and Vermont were not available for inclusion in the tabulations.
Addressed in Section III of this publication are assaults on criminal justice officers employed by five federal government entities: the United States Departments of the Interior, Justice, and Treasury; the U.S. Capitol Police; and the U.S. Postal Service. Within these five federal sectors are 10 agencies, bureaus, or services which employ the majority of the personnel who are responsible for protecting government officials and enforcing and investigating violations of federal laws. On an annual basis, these departments are contacted and requested to submit information on their officers who were assaulted in the line of duty.
The tabulations in Section III concerning assaults on federal officers differ somewhat from assaults on the other law enforcement entities addressed in this publication. The circumstance categories are tailored to depict the unique duties performed by federal criminal justice personnel. Regardless of the extent or even the absence of personal injury, all reports of assaults or threats to assault are included in the compilations.
| Population Group | Population Covered | Number of Agencies |
| Group I (250,000 and over) | 47,017,527 | 64 |
| Group II (100,000—99,999) | 18,812,615 | 276 |
| Group IV (25,000—24,999) | 19,760,978 | 1,256 |
| Group VI (under 10,000) | 15,738,774 | 4,447 |
| Suburban Counties[1] | 39,549,507 | 540 |
| Rural Counties[2] | 19,584,093 | 1,425 |
| Total | 199,816,321 | 8,692 |
