Medicare accounts for more than one-fifth of all health spending in the U.S.. Its costs per beneficiary, about $12,000 in 2008, rose at an average annual rate of 8.5% a year from 1970 to 2007. | Medicare accounts for more than one-fifth of all health spending in the U.S.. Its costs per beneficiary, about $12,000 in 2008, rose at an average annual rate of 8.5% a year from 1970 to 2007. |