Do you mean:
Can you tell me when's the last time you've noticed your penis has grown?
If that was your question, I can say at the new year. When I was 12 it was 4.5. Then in 2006 (13) it was 5.5. Now it's 5.75 (still thirteen), but it took about 8 months to grow by that much.
That doesn't mean that it's close to the stop of growth it's just taking it's time.