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
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Continued Oppositon at the Elections
But if the guidance of the state was at the absolute disposal of the regents, there remained still a political domain separated in some measure from the government proper, which it was more easy to defend and more difficult to conquer; the field of the ordinary elections of magistrates, and that of the jury-courts. That the latter do not fall directly under politics, but everywhere, and above all in Rome, come partly under the control of the spirit dominating state-affairs, is of itself clear.
The elections of magistrates certainly belonged by right to the government proper of the state; but, as at this period the state was administered substantially by extraordinary magistrates or by men wholly without title, and even the supreme ordinary magistrates, if they belonged to the anti-monarchical party, were not able in any tangible way to influence the state-machinery, the ordinary magistrates sank more and more into mere puppets--as, in fact, even those of them who were most disposed to opposition described themselves frankly and with entire justice as powerless ciphers--and their elections therefore sank into mere demonstrations.
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Reference address : https://www.ellopos.net/elpenor/rome/5-08-pompeius-caesar.asp?pg=40