The number of people who identify themselves as data scientists has doubled in the last 4 years, though the total identified in the report is only 11,400 people worldwide. My guess would have been higher by a multiple.
55% of identified data scientists are located in the United States, with the United Kingdom, India, France, Canada, the Netherlands, Germany, Spain, Australia and Israel closing out the top 10.
79% of data scientist have a grad degree. 38% have earned a PhD.