This occupation supported 397,400 jobs in 2012 and 350,400 jobs in 2014, reflecting a decline of 11.8%. In 2012, this occupation was projected to increase by 14.6% in 2022 to 455,600 jobs. As of 2014, to keep pace with prediction, the expected number of jobs was 409,000, compared with an observed value of 350,400, 14.3% lower than expected. This indicates current employment trends are much worse than the 2012 trend within this occupation. In 2014, this occupation was projected to decrease by 4.9% in 2024 to 330,900 jobs. Linear extrapolation of the 2012 projection for 2022 results in an expected number of 467,200 jobs for 2024, 41.2% higher than the 2014 projection for 2024. This indicates expectations for future employment trends are much worse than the 2012 trend within this occupation.