As the title implies, I want to track how much of my traffic (preferably using graph and/or numbers) is IPv6 now, compared to IPv4.

Is there any easy/documented way of doing it?

I'm happy to track from client side (windows client), if there is no solution to run it through my route running OpenWRT or similar to get the stats, however would prefer from the router end so I can capture other devices as well (mobiles etc.)