
This 30-year span shows a sudden rise in the late 60s, peaking at 1970-71 and a slow fall ever since.
My story: I was born in 1980. We had a C64 when I was a child and I have fond memories of playing games on it but I didn't really get into computers until we got our first PC when I was ~10. Eventually getting a modem and thru BBSs I discovered the demoscene which was influential to me, it was an inspiration for me to learn programming and electronic music -- my two main interests to this very day.
Reminiscing on that made me curious as to which computer played the significant role in people's lives here. I'd speculate for the early to mid-70s people it was the C64, for the early 80s people it was the PC and somewhere in the middle are the Amiga folks. Am I getting close? If you'd like to share your experiences along these lines I will be a very attentive listener.
cheers.