In December of 2013, they delivered the 100th plane. I read an article a few days ago that 150 should be done by June.
Now, they aren’t operational. They are having squadrons train maintenance and pilots on them.
If you Wiki F-35, it has a breakdown of how many A, B and C models have been delivered. Personally, I am surprised how many C models (Navy) have been made because of the arrester hook mods they were going to have to do.
Then they haven't actually been 'delivered', have they? I'll be deeply surprised if any of these hangar queens ever do a single CAP.