What are the rare years for Roosevelt dimes?

There really aren't any rare years/mintmarks and all sell for scrap silver in circulated grades. The lowest mintage Roosevelt dime was the 1955 dime with a bit more than 12 million made, however this coin is still very common and if you hunt through a dealer's junk silver you can pick up an example for ~$2.50-3, which is about the value of the silver. There is the 1996-W which was not intended for circulation but has a mintage of about 1.5 million but was released in the 1996 uncirculated mint set but the entire 1996 mint set can be found for cheap.