MCMartinez, you should have received your 2015, you need to speak on the phone or visit them in Person. As to 2016 ...... Some already went out to the tune of about 10 million, typically they send out the smaller refunds first which is the majority of the people.
HOWEVER there may be trouble in the wind ..... As I understand now that the island filed for bankruptcy, the court could freeze all the refunds to pay the bond holders more. it has not happened yet but it could happen soon.
Hope you do not have a great dependency on that money, it may be a while.
Rey