what is the best returning index since may 1980

The Nasdaq Composite (IXIC) has had the highest return since May 31, 1980 by a major index, returning 15,501.5%.

ASSET% RETURN
the Nasdaq Composite (IXIC)
15,501.54%
the S&P 500 (GSPC)
6,083.47%
the Dow Jones Industrial Average (DJI)
5,584.11%