It doesn't, actually, unless you correllate that data against something indicating quality of care. It's been consensus here that the US has better advanced care, less waiting time, and more availability of care (whether it gets paid or not) than Canada. A flat dollar comparison that does not take that into account is incomplete.
I don't know whatchoo talking about, "consensus," but I think you better look that word up in the dictionary. Sure ain't no consensus here. And here are some correllating data indicating quality of care. These aren't cherry picked numbers. There are even a few here that the U.S. wins on, but the trend leans heavily in favor of Canada:
Babies born with low Birthweight: U.S.=7.8% Canada=5.6%
Doctors per 1000 people: U.S.=2.8 Canada=2.1 (U.S. actually wins this one)
Child mortality per 1,000: U.S.=16 Canada=11
Life Expectancy (in years): U.S.=77.14 Canada=79.83
Life Expectancy (Healthy Years): U.S.=67.6 Canada=69.9
Probability of not living to 60: U.S.=12.8% Canada=9.5%
Annual Plastic Surgery Proceedures

: U.S.= 90,992 Canada= 11,102
All the following numbers indicate deaths, by cause, per 200,000 people, year 2000 (most recent data)Infectious and parasitic diseases: U.S.=42 Canada=20.2
HIV: U.S.=10.4 Canada=3.3
Malignant neoplasms (cancer): U.S.=393.4 Canada=407.4
Diabetes: U.S.=49.2 Canada=43.6
Malnutrition: U.S.=2.7 Canada=1.1
Diseases of the Circulatory System: U.S.=668.5 Canada=496.5
Pneumonia: U.S.=45.1 Canada=28.5
Influenza: U.S.=1.3 Canada=3.7
Bronchitis: U.S.=86.1 Canada=62.9
Appendicitis: U.S.=0.3 Canada=0.2
(Exlusive E.R. territory)Chronic Liver Disease: U.S.=21.2 Canada=15.1
Motor Vehicle Traffic Accidents: U.S.=30.1 Canada=16.2
Accidents caused by firearm missile: U.S.=0.6 Canada=0.1
Homicide and injury purposely inflicted by other persons: U.S.=11.9 Canada=3
All Causes: U.S. =1708 Canada=1469.9And we pay over twice what our Canadian neighbors pay for health care. At the very least it seams that we could outlay $2222 per capita to exactly duplicate their system and then use the $3000 per capita above and beyond that, which we are already paying, to make our system better than theirs.