Wonder how this changes when you take basement levels, strange starting floors, or different popular floors into account? My current building has three basement

Wonder how this changes when you take basement levels, strange starting floors, or different popular floors into account? My current building has three basement floors, which are below the ground floor on the button panel, my Uni building's ground floor was actually floor 2 (it was built on a hill!), and the local shopping center has the bottom floors dedicated to parking, so the usual pattern is reversed: 50% of the traffic goes to the top floor to access the shops.