National health spending grew in 2007 at the lowest rate in nine years, mainly because prescription drug spending increased at the slowest pace since 1963, according to a government report. Other types of health spending rose at a brisk pace, pushing the total to $2.2 trillion, or 16.2% of the gross domestic product. Spending averaged $7,421 for each person. Total health spending rose 6.1%, compared with a 6.7% increase in 2006.