Svn access auditing?

I have moved from CVS(nt) to Svn 1.9.7 for our company version
control.
In CVS(nt) we had set up the auditing system, which records repository
activity into an MSSQL database.
Now I am looking for how to implement this in the Svn case.
AFAICT I can do most of what is needed for auditing the *changes* in
the post-commit hook, so I see no real problems there.
But I cannot find any hook for getting information on users accessing
the server to view or download content.
Is there some way to audit non-commit activity in Svn, specifically
checkouts?

-- 
Bo Berglund
Developer in Sweden