It is interesting that the pattern is so consistent. He shows the growth rate of nominal GDP here. Leaving aside trade between the OCED and the rest of the world, when aggregated, final sales to domestic purchasers and total final sales should sum to the same amount. The nominal GDP figures include inventory investment.
Beckworth's diagrams have generated a good bit of attention on the blogosphere. Even Paul Krugman took notice! Unfortunately, he used the opportunity to make bad arguments regarding the liquidity trap.
Well, the first step is for economists to understand that stable growth of nominal expenditure is the goal. Convincing them that appropriate monetary institutions can accomplish it is the next step.