It looks like it was assigned last (after Wyoming - 'x') but they used the 'D.C.' for the alphabetized list. Same with "U.S." = z. Minor quirks in the face of

It looks like it was assigned last (after Wyoming - 'x') but they used the 'D.C.' for the alphabetized list. Same with "U.S." = z. Minor quirks in the face of how useful this is, though.