Oddish: 428 (~30,66%)
Meowth: 356 (~25,50%)
Pidgey: 522 (~37,40%)
Vulpix: 24 (~1,72%)
Growlithe: 36 (~2,58%)
Abra: 23 (~1,65%)
Cubone: 4 (~0,29%)
Houndour: 3 (~0,21%)
Ralts: 0
Total: 1396
Those were my encounters during ~3 hours. Through the entire swarm I've caught 1 Ralts, not included here...