Ph ilade lph ia Supermarkets 2014,2016,2017,2019 Source:N ie lsen,September2014,September2016,December2017,February 2019. Trade Channe l= Grocery.Sub=Channe l= Supermarket,L im ited Assortment,Natura l/GourmetFoods,Warehouse Grocery. Accord ing to N ie lsen data,the numberofsupermarkets in Ph ilade lph ia a yearafterthe PBT was enacted (December2017)was h igherthan the numberofsupermarkets in 2016 (145)and exactly the same as the numberthree years earlier(155). Th is numberslightly dropped to 146 in 2019.