The vast majority of the material was gold filled scrap. I'd say about 85% of the total amount of material was gold filled. The other roughly 15% was mainly gold fingers and ceramic processors from circuit boards, and a very small amount was karat gold. For the record, and possible discussion points of how much one can yield per year as a hobbyist, the first year of the 3 years did not yield much (roughly only 40 grams) as I only processed gold fingers and ceramic processors during the first year. The vast majority of the yield was done in the last 2 years of the total 3 years, pretty much when I started processing gold filled material. Keep in mind that although I did try circuit boards, and was not successful, none of the yield presented in my post was from processing whole circuit boards. The amount of time spent disassembling boards outweighed the yield for me, as I couldn't find a steady supply and the supply that I did find was minimal and lacking, so I stuck with gold filled and gold fingers when I can find them. As far as time goes, in the beginning I spent many hours searching for scrap per day, and then it would take a few weeks before I finished processing. Over the last year or so, I spend about 10-20 hrs a week searching for material online, and when I accumulate at least 5lbs worth, it takes about a week to process.
*Edited for spelling and clarity