maruyamakiyoshi:

It may not be a right idea to gauge to S&P500, but according to X-ray, S&P500 has about 12.4% in energy and 13.10% in industrial materials. FWIW. KM

The percentage of the S&P 500 in different sectors varies over time.  Using the market capitalizations in the S&P 500 Data web page for then end of 2000, at that time energy was 6.6% of the index.