From Wikipedia:
There are no official statistics, and estimates vary considerably. The Small Arms Survey of 2016 placed Swiss gun ownership per capita at 24.45%.
My other info was not dated nor did it say. I was primarily concerned with the law. http://factmyth.com/factoids/switzerland-requires-citizens-to-own-guns/
Seemed the easiest to copy and paste after looking at quite a few. My apologies.
thanks