1 year old is still a boob fiend

This is my first child and my first time breastfeeding so I’m not sure what’s normal and what’s not. My daughter is 12 months old. She eats three meals a day and I’ve just introduced two snacks in between meals as well. Despite this she still wants to nurse all the time. In the morning, between meals, and at night. I’ve even started giving her bigger portions! Is this normal? When do they start slowing down with nursing?