This occupation supported 42,400 jobs in 2012 and 44,300 jobs in 2014, reflecting an increase of 4.5%. In 2012, this occupation was projected to increase by 10.4% in 2022 to 46,800 jobs. As of 2014, to keep pace with prediction, the expected number of jobs was 43,200, compared with an observed value of 44,300, 2.5% higher than expected. This indicates current employment trends are better than the 2012 trend within this occupation. In 2014, this occupation was projected to decrease by 2.1% in 2024 to 43,400 jobs. Linear extrapolation of the 2012 projection for 2022 results in an expected number of 47,600 jobs for 2024, 9.7% higher than the 2014 projection for 2024. This indicates expectations for future employment trends are much worse than the 2012 trend within this occupation.