The Collaborative International Dictionary of English v.0.48:

Numerically \Nu*mer"ic*al*ly\, adv.
   In a numerical manner; in numbers; with respect to number, or
   sameness in number; as, a thing is numerically the same, or
   numerically different.
   [1913 Webster]

WordNet (r) 3.0 (2006):

numerically
    adv 1: in number; with regard to numbers; "in ten years' time
           the Oxbridge mathematicians, scientists, and engineers
           will not be much more significant numerically than the
           Oxbridge medical schools are now"