How much does American health care cost compared to other developed countries?

How much does American health care cost compared to other developed countries? 

American health care costs are much, much higher than in other developed countries.  As a percentage of GDP (gross domestic product) American health care is almost 20%, which is twice the proportion of GDP spent on average in other first world countries.  Put into per person spending, on average Americans spend $10,000 each year per person on health care, which is about twice as much as is spent in other developed nations.  As a comparison, the per person total gross domestic product in Russia is $9000, which is less than what Americans spend on health care.  American health care spending is way more than similar spending in other countries, meaning health care is way more expensive here than anywhere else in the world.  This begs the question:  Why is American health care so expensive?