Layer Estimates:

Layer: World_Countries_PopInvRid2019 (ID:6)
Count: 38
Extent:

XMin: -20037507.0671618
YMin: -7314247.14257368
XMax: 20037507.0671618
YMax: 17926778.564106
Spatial Reference: 102100 (3857)

Layer: inv_data_2019.csv (ID:3)
Count: 43

Layer: pop_data_2019.csv (ID:4)
Count: 266

Layer: ridership_data_2019.csv (ID:5)
Count: 54