In a stark reminder of growing costs, the government has released a new estimate that healthcare spending grew to a record 17.3% of the U.S. economy last year, marking the largest one-year jump in its share of the economy since the government started keeping such records half a century ago. The almost $2.5 trillion spent in 2009 was $134 billion more than the previous year, when healthcare consumed 16.2% of the gross domestic product.