E125/187 41% open area

E125/250 23% open area

E157/187 64% open area

E157/250 36% open area

E196/275 46% open area

E196/314 35% open area

E236/314 51% open area

E236/354 40% open area

E393/511 54% open area

E314/393 58% open area

E354/472 51% open area

E375/500 51% open area

E500/687 48% open area

E750/1000 51% open area

E1000/1500 40% open area