The table below lists the curret & historical GICS sector breakdown of the S&P/TSX Composite stock index. Currently (12/31/2019), the largest sector of the index is clearly the Financials sector (32.08%), which is almost twice as large as the second biggest sector, Energy (17.01%).
[S&P/TSX Composite] – GICS Sector Weightings
Subscribe for the Global Equity Valuations Researcher Dataset by Siblis Research that provides historical valuation data for Canadian stock market since the year 1980. This datataset provides current and historical P/E (TTM) ratios, forward P/E ratios, CAPE ratios, dividend yields, market cap to GNI ratios, sector breakdowns and long-term interest rates of the largest economies and stock markets in the world. Check a sample dataset from here.