One of the measures of Violent Crime in the U.S. is by Volume and Rate per 100,000 Inhabitants.
1997 that number was 611.0 per 100,000.
2016 the number is 386.3 per 100,000.
It would appear we are moving in the right direction over time.
Here is the Chart.
"Mass murder on the job by disgruntled employees are media-intensive events. However, these mass murders, while serious, are relatively infrequent events.
"However, contrary to popular opinion, sensational multiple homicides represent a very small number of workplace violence incidents."
Full article available for download below.
A Gallup poll indicates that the majority of U.S. citizens think crime is increasing, yet as a whole the nation’s crime rate has declined significantly over the last several years. In fact, both the rates of violent crime and property crime have decreased by more than 40 percent since 1995.
From Article- 30 Most Dangerous Cities 2016