Except in rare cases, reversion to the mean is the case, and in the future, with increased emphasis on data mining and complex algorithms, it will only become harder to beat the averages over extended periods. The prudent solution is to invest long-term using well-managed low cost index funds spreading the risk commensurate with your needs. And as Dougal will tell you, past history is no guarantee of future performance.
And given my golf handicap, I'd be thrilled with par.