Earlier quoted context omitted.
Actually there was a 6% increase in salary between 2013 and 2014. And the "data" for 2015 is derived from mere 705 "# of Salaries". There aren't any new recent moves by DHS regarding "OPTs". The proposed change in "STEM Extension", won't come into affect at least until mid 2016.
I compared 2014 to 2015. In regard to DHS, the US court system found that DHS unlawfully created the rules for OPT in 2008 in backroom deals with industry lobbyists. When the court told them so, the DHS went in to "all hands on deck" mode to come up with a work around. (So far they've failed, putting ~130k OPT guest workers at risk of having to leave the country on Feb 12th 2016). Besides the question of what is DHS…
http://www.forbes.com/sites/susanadams/2013/10/03/the-10-job...