English: Federal debt held by the public as a percentage of GDP, historical data from 1790 to 2009, with projections until 2035. The extended-baseline scenario adheres closely to current law, following CBO’s 10-year baseline budget projections through 2020 (with adjustments for the recently enacted health care legislation) and then extending the baseline concept for the rest of the long-term projection period. The alternative fiscal scenario incorporates several changes to current law that are widely expected to occur or that would modify some provisions that might be difficult to sustain for a long period.