I aim for submissions, which I can control, not rejections or acceptances, which I can’t (directly) control. But the principle is sound.
(My figures so far this year: 41 submissions, 2 acceptances, 21 form rejections, 8 personalised rejections. Since the beginning of 2014: 137 submissions, 11 acceptances, 105 rejections.)
Perseverance is the key.
http://lithub.com/why-you-should-aim-for-100-rejections-a-year/
I like yours, 100 submissions. I’ve never been anywhere near even that, by the way.
I did 52 last year and I’m aiming for 60 this year – depending what happens with work, I might exceed it. But I write unusually fast.