there are what, 1000-2000 deaf schools employees who are deaf
4000 deaf federal employees
maybe 5000 deaf working in the private sector (retails, companies, etc).
so the 70% unemployment figures is too high
Proof please, don't forget at least 10 million have hearing loss, these number you mentioned just below 1% of total of Deaf population.
If it is really 70% meaning about 3 million Deafies have job while 7 million don't have job or limited employed. So, please bring up that shows more than 3 Million then we can see where you stand.