"No idea what you're trying to demonstrate with these "post-1990" numbers "
that the Russian Navy is not overwhelmingly full of modern warships (ok younger than 33 years old)
TBH no navy is but there's a tendency to think of them as a massive force - they're not.
There are lots of arguments about the relative value of different classes of ships but numbers are relatively easy to ascertain.
Source is World Naval Review 2023