“Employment in science, technology, engineering and math (STEM) occupations has grown 79% since 1990, from 9.7 million to 17.3 million, outpacing overall U.S. job growth. There’s no single standard for which jobs count as STEM, and this may contribute to a number of misperceptions about who works in STEM and the difference that having a STEM-related degree can make in workers’ pocketbooks.”