This seems like a big number, and a long time, until we consider the popularity and longevity of its competition.
The Nylon 66 yielded a bit over 1,000,000 rifles over 30 years = ~ 33,333 rifles per year...
Comparatively...
The 10/22 is 55 years old with over 6 million produced = over 109,000 rifles per year.
The Marlin 60 has been running for 59 years this year, with over 11 million produced = over 186,000 rifles produced per year.
So Ruger was selling about 3:1, and Marlin selling almost 6:1 over the Nylon.
The Marlin 60 is the highest production non-military/non-contract firearm - ever. THAT tells a guy “it’s a pretty good rifle.”