Tournament All-In Open Shove Stats

Here's some tournament data I'm trying to make sense of. Maybe some of you can help me. The data consists of All In opening shove statistics broken down by position and stack size in big blinds. The left hand columns are my own stats, the right hand collumn includes the statistics for all opponents I've faced or observed.
I started with 25-30bb's and worked my down.What I find confusing is that it seems that the bigger the stack size, the more likely the all in shove is to be called. This seems counterintuitive. I've always played with the assumption that the bigger your stack is, the more fold equity you should have, but that doesn't appear to be the case. One thing that might be happening is that for the most part, as your own stack size decreases in terms of bb's, so is everyone elses. It may be that as stack sizes decrease relative to the blinds, play tends to tighten up. The exception seems to be when you get down below 5 bb's. In these ultra short stack situations your shove is almost guaranteed to be called.
So anyway, have a crack at it and feel free to comment on anything else that jumps out at you.

Attached Images

AI 30-20bb.jpg (50.5 KB, 23 views)

AI 20-10bb.jpg (51.2 KB, 23 views)

AI 10-0bb.jpg (45.4 KB, 23 views)

I just finished a session of play chip rush poker. I noticed a few people with 1,500BB's open shoving every hand. I feel if they generated that big of a stack, they are shoving light and gambling to get that stack. Thus, I give people with giant stacks less respect the people with medium sized stacks. I called his shove with KJ and they showed Q9. I think this also applies to the first hand of low stake and freeroll tournaments too.