Which bicentennial dollar and non bicentennial have any silver in them?

This may get a little confusing: For 1971 & 1972 all the "S" mintmarked coins are 40% silver and were struck as Proof and Uncirculated.

From 1973 to 1976 the Mint issued a Copper-Nickel "S" mintmarked Proof coin along with the 40% silver issues. No silver coins were issued in 1977 & 1978.