Right..nobody asked me if I used ASL for a survey so I am sure there are a lot of deaf people who werent counted whenever these stastistics were made.
Right. And the following was also stated in this paper:
we might imagine that ASL would be counted among non-English languages
“spoken” at home. However, this is not the case. In the initial data processing phase,
any mention
of an American signed language is coded as English by the U.S. Census Bureau, apparently on
the curious grounds that signed languages are not written and, therefore, cannot be included in
ballot materials (Day, personal communication, October 26, 2004
AND
Unfortunately, deafness is predominantly treated as a matter of public health and social
welfare policy in the United States, not primarily as a social and linguistic phenomenon within
the general population
AND
The collection of national data on deafness (and other disabilities) is now driven largely
by the priorities of the U.S. Public Health Service and the Social Security Administration in the
form of two national survey programs: the National Health Survey (see National Center for
Health Statistics, 1963) and the Survey of Income and Program Participation (see U.S. Bureau of
the Census, 1986). The former published its first estimates of deafness prevalence in 1965
(Glorig & Roberts, 1965), the latter in 1986 (U.S. Bureau of the Census, 1986). Neither of these
data collection programs has ever inquired about sign language or ASL use.
So, it really is pretty obvious that any numbers provided by a CI manufacturers website are suspect.