I'd be interested in seeing the poll results. Unfortunately, I can't view them, as none of the poll options fit. I'm going to try not to be too long-winded in explaining my social experiences through the years.
In Kindergarten, I did some talking to my peers, but I didn't interact much, and I kept to myself during times of the day when other children were playing together.
In first grade, I had one friend I would play with, and I did sometimes talk to other children as well.
In second grade, my one friend made two new friends who didn't like me, and that friendship ended. I was not able to move on and make new friends. That year, I also had a teacher who did not understand my difficulties, in spite of having a copy of my IEP, and attending IEP meetings to discuss my educational needs. She regularly disparaged my abilities and humiliated me in front of my peers. From that time on, I became increasingly quiet and withdrawn in school. Within a couple of years, this progressed to the point where I almost completely stopped speaking in school, giving mumbled one-word answers to my shoes when someone spoke to me. This is how it was for pretty much the remainder of my time in the public school system.
In high school, I did start talking a little more, and I gained a small measure of recognition as an editorial writer for the school newspaper. However, I was still very quiet, and I didn't make any actual friends.
In college, I was somewhat more social. I had some transient friendships, and one that endured. I went through some periods of isolation there as well.
I was working full time through most of my time in graduate school, attending part time and commuting to classes from work. I did talk to my peers somewhat, though I mostly stayed quiet. I didn't even know how to make friends in that situation, and I honestly had too much going on to even be interested in making friends.
No, there's no poll option that comes close to fitting my situation.
ETA: This was pretty long-winded, in spite of my best efforts. I still have a long way to go toward mastering the art of brevity.
Well based on what you've explained it seems as if grade 2-8 were your most isolated years, so yeah it would be hard to pick one. That's okay though, if you post a comment but don't vote then that's perfectly fine.