![Mail Carried by USPS and Parcels Carried by Major Carriers, United States, 2004-2022 | The Geography of Transport Systems](https://i0.wp.com/transportgeography.org/wp-content/uploads/mail_parcels_carried_united_states.png?resize=900%2C422&ssl=1)
The Covid-19 pandemic had a substantial effect on parcel deliveries in the United States. While mail deliveries dropped, parcel deliveries surged due to shifts in demand patterns. Through vertical integration, Amazon accounts for a growing share of the deliveries of the parcels it ships.