I think it would be different if you are talking about outright whips (falls while trying/going for a move), or about takes on bolts.
The busiest routes at the red, if you use the spray distribution in the online guidebook overview stats as the basis for making this statement, are 5.10a's (~16,000 recorded spray entries, as opposed to 5.12a (~8,000 range).
RRCGuide/?type=overview_dataBut I would argue that the number of lead falls on those easier routes, as a fraction of total number of climbs on them, is much smaller. Based on my personal observation. People who are newer climbers are a lot less eager to take a lead fall, and more likely to ask for a safer take, if they are feeling shaky. And they are also a lot less likely to actively work on redpointing routes.
So if we posit that the climber working 5.12a is twice as likely as a climber on 5.10a to go for it and take a lead fall (not an unreasonable estimate, I would actually say that it is a lot more than 2x as likely) then most lead falls would be on easy 5.12 routes, even though there are more ascents on the easier routes.
So pick a classic 5.12a or 5.12b that has been around for a long time, is an entry level 5.12 climb, and has a defined crux. Maybe include once-rated-5.12a-now-downgraded-to-5.11d, too.
I'd say Tissue Tiger and Gung Ho, both near the top,
Manifest Destiny at the roof bolt,
Magnum Opus ~3-4th bolt,
Check Your Grip, in the sloper section, whichever bolt that is
Chainsaw crux
Ale 8 at the top.
Ro Shampo and Bare Metal Teen would have qualified once, but I think the number of sends (and falls) on these is down quite a bit since they are now in semi-closed restricted areas.