Why do 5-year returns for some Sectors and Industries greatly exceed the S&P 500?

The performance values for industries and sectors are calculated by an equal-weighted average of its surviving component stocks. This means that a successful small-cap stock can have a big effect on the long-term return of its industry. It also means that bankrupt or de-listed companies are not included in our calculations.

How current are the... How come the 5-day Return...