How to count total number of rules in CRS

I am trying to reproduce the total number of rules in CRS as given on this page, but have not found any success till now.

I am running the following command to get all the occurrences of the word Sec in the CRS rules directory. I am using CRS v3.1.0 for this testing.

grep -c "Sec" *.conf | cut -d':' -f2 | awk '{total = total + $  1}END{print total}' 

The result will include all the words, including SecRule, SecMarker, SecComponentSignature, SecAction. Still, the result is 847, which is nowhere near to the number of rules mentioned in the above page (1634). I am not able to identify my mistake here.