The first dimes minted for circulation did not appear until 1796, due to a lack of demand for the coin and production problems at the United States Mint. They were made up of 90% Silver and 10% copper up until 1964. The early years are popular due to their lack of availability in the market and the limited time the early types were made. Varieties caused by the overused, worn out and re-polished, broken dies make this an interesting area to collect as well. With later styles ranging from seated liberty to liberty head to Mercury dimes, there is a wide variety to collect. With the induction of the Roosevelt design in 1946, dimes became easily collected by date and mint and their popularity increased. Their transformation over the years has made them a sought-after coin and denomination.