I use about 16 lb of rifle and a couple of lbs of pistol per year give or take, so I am in the 150 - 200 range. I get a general idea of my reloads by keeping the primer trays. First of the year, throw em out and start a new stack. This picture was taken in September.
I used to keep my primer boxes and trays as a record of approximately how many rounds I've loaded, but it took up too much space so now I just have a sheet of paper taped to my loading shelf where I keep track of the number of empty 1k primer boxes as I throw them away.