I've tried selecting the table in the document, copying it, and pasting into a new spreadsheet, but this results in a one-column spreadsheet with all of the columns flattened into one.
I don't see a way to select a single column, or I could potentially copy the table a column at a time (it only has about 13 columns).
I only have to do this to one document, so a multi-step process is OK.
PS, I'm using the Chrome browser on a Mac