I believe the normal capacity for towers is around 33k (the official figure mentioned all the time is 28k but its definitely more than that). The capacity lasts season was about 10k, which is 1/3 of its normal capacity. However towers barely ever reach capacity and normally have around 15-20k on busy days. Still a lot more than with social distancing, but similar queues which gives you an indication of how much missing rows has effected the throughput of the coasters