It's deliberately misleading. "between 1929 and 1932" is a misleading way of saying "in 1932". Almost all of the deficit increase and public works spending occurred in 1932 (due to a single bill: the Emergency Relief and Construction Act) near the end of Hoover's presidency, but by saying "between 1929 and 1932" it makes it sound like it was a consistent policy throughout the downturn. In reality by that time in 1932 the depression was already near its worst lows and Hoover had tried keeping the budget balanced prior to that and only had a few months left in office.