I'm not sure why that would mean it doesn't go higher than top 2%, it would only imply the scores you ended up with were in the same percentage bracket.
Confirming this, it looks like you indeed get top 0% when you end on a perfect score of 5000 with an average of 0 years off.
Confirming this, it looks like you indeed get top 0% when you end on a perfect score of 5000 with an average of 0 years off.