(That was over a long period of time - mostly used up now.)
Used up how? On who?
You really asked that question? OMG.
Ok, deep breath, respond civilly...
For one, Israel has expended a LOT of munitions on Hamas since 10/7/2023. Prior to that there were the “routine” clonkings of the many terrorist groups / cells.
Missile attacks on Israel use up a lot of interceptors, plus munitions used to respond. Here is some reading material for you, covering many years including those under discussion:
https://en.wikipedia.org/wiki/Lists_of_Palestinian_rocket_attacks_on_Israel
Further research is encouraged. :-)