Sensex PE Ratio since 1999
Sensex Monthly Returns since 1979
However, note that the Sensex has changed its nature over the years, from being full market-cap weighted to free-float market cap weighted. So the returns in earlier years (pre-1990s) are not directly comparable to those since then.
For more on this, read Can you trust long-term Sensex data? – Business Standard
Also see:
Nifty Indices Performance since inception compared