Dang! I'm surprised the let that one out of the Mint. I thought they put in ramps instead of steps in the 1960s and didn't take them out until 1971...
OK, I see that, and that's different for that series. In fact that's what I was suspecting after Jeff's comment, but I wanted to be sure.
Here is a nicer 62 (edit: from a mint set) and it doesn't have more than a full step and a couple partial steps...
Per Red book 5FS 1/2000, 6FS unknown. It a very hard to find coin for 5C's. There's a few steps in there if you take a look.