Good point. The number of attempts is important also imo. Here are the overall numbers.
3rd down attempts - 80 (31st)
3rd down % - 42.5% (11th)
4th down attempts - 8 (t10th)
4th down % - 87.5% (2nd)
Just how many 3rd & 7+ do we end up in? I would guess very low if our overall 3rd down attempts are that low and overall success rate that high.