We are a 2 person household between me and my wife. I logged all of our received mail from our mailbox every day in a sheet then converted the data into a json node so I can use http://www.sankey-diagram-generator.acquireprocure.com/
to generate this diagram. I categorized each mail piece into broader
categories to be able to make this Sankey chart readable. I categorized
any unsolicited mail into Junk Mail. Only of 5 out of 425 mail pieces was
mail that could not have been sent in an email.