Explanation (though I'm sure here on NCD there are plenty of tankfuckers who could correct me on any number of details here): A great deal of popular mythology has grown up around the Nazi Tiger tank in WW2, especially in comparison to the main American tank of the later war, the Sherman tank. Thing is, while the Tiger tank was a massive and dangerous beast, it was also hyperspecialized for tank-on-tank combat, which means accounts of Allied tankers going "Oh God oh fuck it's a fucking Tiger" are not fully representative of the actual wisdom of the Tiger's design and deployment. In reality, the Tiger was unreliable and maintenance-heavy, slow, and not particularly survivable - Tiger losses were, as the graph shows, nearly total. And of those losses, German tankers were not particularly likely to survive the loss of their tank - 80%+ of crew of destroyed German tanks were kaput.

By contrast, the Sherman was an excellent multipurpose tank which could support infantry and fight toe-to-toe with enemy armor when necessary. But, in general, we Americans preferred to let specialized, fast-moving tank destroyers and airpower to do the lifting on destroying enemy tanks. Perhaps more importantly to tankers, the survivability of the Sherman was the reverse of German tanks - the Sherman was built with escape of the crew in mind (and repairability of the vehicle, for that matter), meaning 80%+ of the crew of destroyed Sherman tanks survived, and the tank itself was often repaired and returned to combat in a matter of weeks as well.

Lend-Lease tanks are counted as all destroyed just to demonstrate the point - Lend-Lease tanks were largely in the hands of the Soviets, who considered it a comparable tank to the T-34, but didn't keep exact records on combat losses of the Sherman. Even if 100% of them were destroyed, as the graph shows, the dreaded Tiger still doesn't come out looking too great in comparison to the comfy compartments of a Sherman!