I wouldn't be surprised if wages in the parts of the global population that's currently industrializing (parts of China and India) went up by way more than 43% though.
One thing I've realized in recent years (thanks to silicon valley stock options): It's not that hard to get into a >99% income bracket for a year or two. You basically just need to participate in an IPO-style windfall, and maybe split it over two tax years. However, staying in that bracket is much harder; you need to have a windfall every year (so, be a successful VC) or be an executive.
For that reason, I'd be interested to see income percentile statistics broken out over a 10 year period vs. annually. Some people summarize this effect with the acronym HENRY (High Earner, Not Rich Yet).