LOL. The irony of posting your own evidence-free unsubstantiated suspicion and then asking Bruce to provide evidence to the contrary.That said, my own suspicion is that as is the case with so many current-day so-called "journalists," he merely concocted a number he liked, got comfortable with it, and then just plugged it in.
The above notwithstanding, if you have any actual evidence to the contrary, I am all ears (eyes).