Hydro Review, May 2017, by Michael Harris.
http://www.hydroworld.com/articles/hr/print/volume-36/issue-4/cover-story/all-eyes-on-hydropower.html

"With the legislative framework and public sentiment leaning heavily toward renewable generation around the world, hydropower continues to be a valuable commodity. Data pulled from a number of recent studies shows its growth and provides hints as to where it is going."