According to the CSCMP State of Logistics 2020 report by AT Kearney, the cost of logistics is 7.6%of U.S. Gross Domestic Product. This rate is an average of 7.63%for the last 10 years.
In the U.S., the share of the shipping sector alone is 4.9%.
The source report is available at https://f.hubspotusercontent00.net/hubfs/6906256/Kearney-Resilience%20tested-2020_State%20of%20Logistics.pdf.