This occupation supported 4,110,200 jobs in 2012 and 4,238,000 jobs in 2014, reflecting an increase of 3.1%. In 2012, this occupation was projected to increase by 28.1% in 2022 to 5,266,000 jobs. As of 2014, to keep pace with prediction, the expected number of jobs was 4,341,300, compared with an observed value of 4,238,000, 2.4% lower than expected. This indicates current employment trends are worse than the 2012 trend within this occupation. In 2014, this occupation was projected to increase by 23.7% in 2024 to 5,212,200 jobs. Linear extrapolation of the 2012 projection for 2022 results in an expected number of 5,497,100 jobs for 2024, 5.5% higher than the 2014 projection for 2024. This indicates expectations for future employment trends are much worse than the 2012 trend within this occupation.