What's the average net profit margin for Private Label Brands on Amazon US?

If you sell a private label brand on Amazon US, what’s your average net profit margin after all expenses?

Please share:

1. Your net margin %

2. The main category you sell in

Trying to get a realistic picture from actual sellers, not gurus.

I’ve seen answers ranging anywhere from 8% to 30% depending on the category, but I’m wondering what the realistic number is in today’s market.