Why data science and machine learning are the fastest growing jobs in the US

LinkedIn recently published a report naming the fastest growing jobs in the US based on the site's data. The social networking site compared data from 2012 and from 2017 to complete the report. The top two spots were machine learning jobs, which grew by 9.8X in the past five years, and data scientist, which grew 6.5X since 2012. In all the top ten positions, four relate to data science and three out of those four are in the top five spots. So why are data science positions, and specifically machine learning positions, growing so fast?