Ruger 10/22 age?

[m-man]

If my 10/22 serial number is 155958, is it from 1964?
i was looking here

https://www.ruger.com/service/productHistory/RI-10-22.html

but i don't really understand the numbering, mine has no prefix and starts with a 1, but I'm not sure

[Garand1911]

SN#131304 - 186075 built in 1968
SN# 186076 built in 1969

Your gun 155958 is built in 1968