Table 24. Commerce at Project Harbors (Except Great Lakes) Calendar Year 1953-Continued

[In tons of 2,000 pounds]

Table 24. Commerce at Project Harbors (Except Great Lakes) Calendar Year 1953-Continued

1 Tonnage by type of traffic not reported for projects which handle less than 25,000 tons

The sampling error exceeds 100 percent.

"The sampling error is between 10 and 19.9 percent.

NOTE: Effective July 1, 1953 export tonnages of $100-499 valued shipments were estimated based on a 10% sample. Except for the items footnoted above, the error due to sampling did not exceed one percent.

Table 25. Commerce at Project Harbors On The Great Lakes, Calendar Year 19581

[In tons of 2,000 pounds]

Footnotes at end of table.