Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
Evidently here too
it was Caesar's intention to revert to the traditions
of the earlier republican times, and to reintroduce the census
of the empire, which the earlier republic had effected--
essentially in the same way as Caesar effected the Italian--
by analogous extension of the institution of the urban censorship
with its set terms and other essential rules to all the subject
communities of Italy and Sicily.(102)
This had been
one of the first institutions which the torpid aristocracy allowed
to drop, and in this way deprived the supreme administrative authority
of any view of the resources in men and taxation at its disposal
and consequently of all possibility of an effective control.(103)
The indications still extant, and the very connection of things,
show irrefragably that Caesar made preparations to renew
the general census that had been obsolete for centuries.