The silver coins were hoarded upon their release in March 1964 by collectors and those interested in a memento of the late president. Although the Mint greatly increased production, the denomination was seldom seen in circulation. Continued rises in the price of silver increased the hoarding—many early Kennedy half dollars have been melted for their silver content. Starting with 1965-dated pieces, the percentage of fine silver was reduced from 90% to 40% (silver clad), but even with this change the coin saw little circulation.