- Value of freight: $1.3 billion
- Share of domestic freight originating in Maryland: 0.6%

- Value of freight: $1.6 billion
- Share of domestic freight originating in Maryland: 0.7%

- Value of freight: $1.7 billion
- Share of domestic freight originating in Maryland: 0.8%

- Value of freight: $2.0 billion
- Share of domestic freight originating in Maryland: 0.9%

- Value of freight: $2.3 billion
- Share of domestic freight originating in Maryland: 1.0%

- Value of freight: $2.7 billion
- Share of domestic freight originating in Maryland: 1.2%

- Value of freight: $3.3 billion
- Share of domestic freight originating in Maryland: 1.5%

- Value of freight: $3.4 billion
- Share of domestic freight originating in Maryland: 1.5%

- Value of freight: $3.5 billion
- Share of domestic freight originating in Maryland: 1.6%

- Value of freight: $3.6 billion
- Share of domestic freight originating in Maryland: 1.6%

- Value of freight: $4.1 billion
- Share of domestic freight originating in Maryland: 1.8%

- Value of freight: $4.8 billion
- Share of domestic freight originating in Maryland: 2.1%

- Value of freight: $5.2 billion
- Share of domestic freight originating in Maryland: 2.3%

- Value of freight: $6.3 billion
- Share of domestic freight originating in Maryland: 2.8%

- Value of freight: $7.1 billion
- Share of domestic freight originating in Maryland: 3.2%

- Value of freight: $7.2 billion
- Share of domestic freight originating in Maryland: 3.2%

- Value of freight: $8.4 billion
- Share of domestic freight originating in Maryland: 3.7%

- Value of freight: $18.6 billion
- Share of domestic freight originating in Maryland: 8.3%

- Value of freight: $32.2 billion
- Share of domestic freight originating in Maryland: 14.3%

- Value of freight: $89.4 billion
- Share of domestic freight originating in Maryland: 39.7%

This story features data reporting and writing by Paxtyn Merten and is part of a series utilizing data automation across 50 states and Washington D.C.