"National health spending grew by 5.2% in 2014, and preliminary estimates show 6.6% growth in February 2015 compared to February 2014. The health spending share of gross domestic product was 17.9% in January, slightly below the 18.0% all-time high rate hit in December 2014. Spending in February 2015, year over year, increased in all major categories. Prescription drugs grew the fastest, by 10.5%, and hospital spending also rose rapidly at 9.0%."