The numbers below include duplications, the extent of which cannot be accurately determined at this time. For instance, it is known that some number of journeyman sheet metal workers have also earned NATE certifications. Thus, those same technicians are reported in both groups. Likewise, some number of journeyman pipefitters have also earned STAR certification, so they are reported in those two groups. It is likely there are other duplications as well.
In the meantime, this census does provide some evidence that these credentials are valued by a measurable percentage of the estimated 40,000 installers, service and maintenance techs in the state. In fact, the percentage may be higher than supposed.
This information was last updated in 2015.