There are two ways to export shape data from a document. You can simply export the data as a table in a CSV file (the reverse of the import command) or you can create a manifest that combines the data and counts the types of any item selected.
Export Data Table
First, make sure you're in data mode by clicking on the Data icon in the Left Bar. Next, click on Actions and choose Export Data Table. This will generate a CSV file of your data.
Learn about generating a manifest here.