I spent half that time in Critical Care (much of that on a ventilator, a small amount sedated), and most of the rest in a specialist neuro-rehab unit. I would have died otherwise.
Fortunately it cost me nothing - Thank Bevan for the NHS - but if I were in the US I imagine I would be financially crippled!
With the recent changes to the medical insurance landscape in America, and thousands upon thousands of people losing their jobs due to various factors, your 90% figure is pretty generous. Add in the fact that most insurance is tied directly into employment, Americans have much less options than the rest of the free world, unless you are filthy rich.