Five pounds per year you say???
I have several different powders on hand, simply because I shoot so many different firearms, with different chamberings. 3000-4000 rounds of centerfire per year is my norm. That's why I purchase everything in Bulk quantities.
I use between 20 and 30 pounds of powder a year, but I will admit I'm shooting a lot less in my rusting years. I still enjoy it every bit as much but my eyes and body are telling me such things are not forever.
I too, was just joking
LAMO = Laughing My Azz Off