No one does that reliably. It's 5-7% after inflation on average, where a five-year average is expected to get you within 2 percentage units or so of that number

No one does that reliably. It's 5-7% after inflation on average, where a five-year average is expected to get you within 2 percentage units or so of that number. Commonly large deviations over shorter timeframes and rare deviations over longer timeframes. The last 15 years have been one such deviation, maybe GP figures that's the normal now.