Zero
You may want to have your bodyfat percentage taken hydrostatically now. I think it's impossible to judge bodyfat by appearance since everyone is different but you appear very low. When I was tested hydrostatically, I was much lower than I thought and decided to just lower my percentage by another .5% since it may cause health problems to go much lower. It's important to have the hydro weighing performed by a reputable center and not just a gym.