Presidential Candidates Drop Out Order

Start with who already dropped out...feel free to disagree & guess. I'm saying Rubio vs. either Sanders or Clinton.
  1. Lincoln Chafee
  2. Jim Webb
  3. Bobby Jindal
  4. Rick Perry
  5. Scott Walker
  6. Lindsay Graham
  7. Jim Gilmore
  8. Mike Huckabee
  9. Rick Santorum
  10. George Pataki
  11. Chris Christie
  12. John Kasich
  13. Carly Fiorina
  14. Rand Paul
  15. Martin O'Malley
  16. Ted Cruz
  17. Ben Carson
  18. Donald Trump
  19. Jeb Bush