Earlier quoted context omitted.
They know how many have h1bs, but not how many of them are actually in the US. Which is just amazing. We need to bend over and let them take our privacy away so they can fight the terrorists apparently, but the same government doesnt even keep track of how many h1b holders are in the country? If the data of who every citizen is calling on their phones is so important for national security- how is it not worth the gov…
When was the last time you traveled outside the USA? Did you notice how Customs and Border Patrol did not check and stamp your passport, like they do for incoming travelers? Therefore, since there is no way to detect when an H1B worker leaves the country, there is no easy way to estimate the number of H1Bs currently in the country.
This site will let you search your own travel history with both arrival and departure dates - https://i94.cbp.dhs.gov/I94/#/history-search