How many silvers dollars minted between 1900 and 1999 comprise a complete set?

Morgan silver dollars were minted 1900-04 (originally starting in 1878), and again in 1921. Then Peace silver dollars were minted from 1921 until 1928, as well as 1934 and '35. No dollar coins were minted again until 1971 with the introduction of the Eisenhower dollar, though by then they were made of nickel-coated copper instead of silver, except for some collector specimens. In 1979, there was a change to the smaller Susan B. Anthony dollar, which was only minted for three years, and again in 1999. For a complete set of 20th century U.S. dollar coins from Philadelphia, New Orleans, Denver, and San Francisco, including all proof and collector versions, there are 18 Morgans, 24 Peace, 32 Eisenhower, and 11 Anthony dollars, for a grand total of 85 different coins.

Note: Some dates have more than one variety, such as the 1972-P Eisenhower or 1979-S Anthony, which would add to the total.