It's impossible to know...
We can't even tell for SG-1, since there are occasional references to other missions we've not "seen", but there are then an unknown other number of SG teams and specialist teams as well.
The only vaguely possibly hint would be to refer to SG-1 10:06 "200" which is Colonel Mitchell's 200th time through the gate, and extrapolate from that. If one were to guess how many other teams there've been.