There are some great Pilgrim Statistics on this site: https://oficinadelperegrino.com/en/
If you are planning a Camino and have these types of questions, take a look.
How many pilgrims walk each year?
Which routes are most popular?
When are the busy months? What’s the age range and gender of Pilgrims?
Where do Pilgrim’s start from? How many stamps a day do I need?