The following graphs are for inbound and outbound traffic at the ports of Los Angeles and Long Beach in TEUs (TEUs: 20-foot equivalent units or 20-foot-long cargo container).
To remove the strong seasonal component for inbound traffic, the first graph shows the rolling 12 month average.
On a rolling 12 month basis, inbound traffic was up 0.9% compared to the rolling 12 months ending in August. Outbound traffic was down 0.4% compared to 12 months ending in August.
Inbound traffic has been increasing, and outbound traffic has been mostly moving sideways.
The 2nd graph is the monthly data (with a strong seasonal pattern for imports).
Imports were up 10.6% year-over-year in September, exports were down 5.6% year-over-year.
This might suggest retailers are expecting a happy holiday season.