
I took the lists of the year and counted the number of people who were on the list in 2014 but not in 2016.

Since it wasn't enough for the OP I went on and did more research and found the list of American billionares from 2014, sadly nobody did a list of the Jewish billionares for that year, and since I'm not going to check the list one by one, I did an upperbound estimate. In my answer to the question Were 48% of American billionaires Jewish in 2014? I gave an answer regarding the 2016 numbers.
