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
The Finances in the Revolution
The financial condition of Rome of course assumed a far worse aspect, when the storms of revolution set in. The new and, even in a mere financial point of view, extremely oppressive burden imposed upon the state by the obligation under which Gaius Gracchus placed it to furnish corn at nominal rates to the burgesses of the capital, was certainly counterbalanced at first by the newly-opened sources of income in the province of Asia. Nevertheless the public buildings seem from that time to have almost come to a standstill. While the public works which can be shown to have been constructed from the battle of Pydna down to the time of Gaius Gracchus were numerous, from the period after 632 there is scarcely mention of any other than the projects of bridges, roads, and drainage which Marcus Aemilius Scaurus organized as censor in 645.
It must remain a moot point whether this was the effect of the largesses of grain or, as is perhaps more probable, the consequence of the system of increased savings, such as befitted a government which became daily more and more a rigid oligarchy, and such as is indicated by the statement that the Roman reserve reached its highest point in 663. The terrible storm of insurrection and revolution, in combination with the five years' deficit of the revenues of Asia Minor, was the first serious trial to which the Roman finances were subjected after the Hannibalic war: they failed to sustain it.
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Reference address : https://www.ellopos.net/elpenor/rome/4-11-commonwealth-economy.asp?pg=27