Unable to visualize data on map – January 26, 2023 at 04:10PM

Hi all,

I’m relatively new to GIS but am using it for work deliverables. I’ve been trying to visualize data on ArcMap that imported I from Excel and joined to a feature class. I want to do it through Graduated Colors, but nothing is showing up (also doesn’t work for any other symbol/visualization):

https://preview.redd.it/tn6ey8r68gea1.png?width=1011&format=png&auto=webp&s=716a6b29f8c5556fd4889828051b7640e2cf7406

The data isn’t anything complicated – it’s the total number of calls made from certain zip codes. I’ve tried using other zip code shapefiles in other documents but I still get the same result. Has anyone ever tried to do something similar on ArcMap? Is there something that I need to do with the data? Any help would be super helpful. Thanks!