The GCP's emission data from the start of 1959 to the start of 2022 shows a
total of 185.58 ppmv of estimated fossil carbon emissions.

Only 5.56 ppmv (= 3.0%) of that is CO2 from cement manufacturing.  That's the
CO2 released from CaCO3 (limestone) as it's baked in the kiln.

For just the most recent years, the percentage is a bit higher.  E.g., for 2021
the GCP estimates fossil carbon emissions = 10.13153 PgC (= 4.7580 ppmv), of
which cement manufacturing = 0.45647 PgC (= 0.2144 ppmv) = 4.5%.

It is commonly claimed that cement manufacturing is responsible for up to 8%
of all anthropogenic CO2 emissions, but that figure includes an estimate of
emissions from the fossil fuels which are burned to heat the kilns, typically
accounting about half of the total CO2 emissions from cement manufacturing.