What percent of torrent users have open ports and are connectable? What would the speed difference be?

So until now I always had closed ports because my ISP put me behind a CGNAT and can’t open ports (No I don’t need a vpn because no one cares in my country) Over time I just accepted that I cannot open ports but recently saw that if I tell them they will take me out of the CGNAT and be connectable, now I’m waiting for that....