This is nice. It'll be interesting to see how these official reports match up and/or differ in design or results with Steve Ballmer's new government spending tracking project[0] as they continue. For example, Ballmer's org reports that spending in 2014 was significantly larger then the number for 2016 reported on this site (5.2 trillion v. 3.85 trillion). It's also interesting to see the difference in how spending is labeled by constituional "mission" in the USAFacts site or function on the USASpending site. In any event we're better off having both of them.

[0]-https://www.usafacts.org

EDIT - add examples, reference url