If you’re referring to Camp David during the Clinton years, the figure was actually even higher. The figures I’ve seen suggest that Israel was willing to give back 94-96% of the land.
The reason Camp David failed, and Israeli negotiator Schlomo Ben Ami has since conceded this, is that the missing 4-6% were pieces of fairly high value to the Palestinians. More importantly, however:
-There was no mention of restoration of water rights
-There was no mention of restoration of air space rights
-There was no mention of withdrawing checkpoints
-There was no mention of cessation of tree uprootings, farmland destruction, house demolitions, etc
-Speaking of house demolitions, there was no mention of easing of difficulties obtaining house construction permits
That, above all, is why Ben Ami himself conceded that the Camp David deal was impossible and that no Palestinian leader, not even that incompetent buffoon Saeb Erekat, would have accepted it. That’s also why Clinton came forth with his parameters at Taba near the end of his term...but Taba failed because Barak prematurely withdrew his negotiators. In fact if one takes Israeli political commentary even half serious, one comes away with the impression that Taba was just a last ditch election ploy and not a serious negotiation effort. More on that later.
If anyone is curious about this, I’d suggest reading scholarship by Clayton Swisher and Ron Pundak.
Since 1967, Israel has not made a good faith effort to resolve the occupation. That is what makes the occupation illegal, and there’s international precedent for such a label.
Namibia took its case against South African occupation to the ICJ back in 1971. The ICJ subsequently ruled that the occupation was illegal because the occupier ceased attempting good faith efforts at a resolution.
Israel has repeatedly sabotaged opportunities at good faith efforts, with the lone exception (and even that was forced upon them with no real alternative) being Camp David in 1978. And that was Egypt, not Palestine. They’ve repeatedly engaged in what the Likud government in particular calls “mowing the lawn,” which is when they go into Gaza and smash the place up with about 1-2k civilian casualties and untold property damage, they murdered 20k people in Lebanon to quash what Avner Yaniv called “Arafat’s peace offensive,” they’ve illegally blockaded Gaza for going on 16 years, they continue to expand settlement construction in the West Bank, and most importantly, they continue to beg the US to do their bidding on the international arena (Biden just vetoed an SC resolution this past week). Those are all the exact opposite of what any ICJ would call “good faith efforts.”