Which freight transportation mode experienced the greatest growth $($based on tonne$-$kilometers of freight moved annually$)$ in the United States between $1960$ and $2000?$

Figure $2\mathrm{.}5$ U$.$S$.$ Tonne$-$Kms of Freight $($Millions$)$

SOURCF: US$.$ Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, Table $1-46$a$.$

$($i$)$

oil pipeline

water,

truck

rail