Lots of predictions for interest rates buit into those 10 year estimates. No can do that with ANY accuracy as time has proven. Long term deflation, global central bank stimulus and low rates without any significant inflation may be just as likely years from now as we approach the ten year mark. Remember in 2000 , with a 100 bil. Federal surplus, the Clinton administration predicted to half the federal US deficit in ten years? Or, was this the same beaurocracies making these predictions then. So, at todays rates , roughly speaking , the US deficit will have to create about 800 bil of additional debt service or about 80 billion of new debt over the next 10 years. Build in a lot of error on my part and callit 40 billion of new debt. sensational fake news.