How many donate blood?

I donate to the MOPAR Gods every time I wrench on my car. :toothy10: Sorry if this is in bad taste. Not ment to offend anyone.
Just curious, doesn't the hospital CHARGE patients for this DONATED blood. :dontknow:
I am all for helping others but why are they making a profit from this.

I'm pretty sure its free here I was Never charged for the aproximately 16 pints of blood that I needed over 7 months last year to stay alive.