http://www.cbo.gov/publication/21902 Public Spending on Transportation and Water Infrastructure http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 data set http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 Public Spending on Transportation and Water Infrastructure http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 25 percent http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 Public Spending on Transportation and Water Infrastructure http://www.cbo.gov/publication/21902 http://www.cbo.gov/publication/21902 federal spending averaged