Commodity prices fell almost another 1 percent in October, the eighth consecutive monthly decline.
The biggest fall was in the price of pelts, which plummeted 14 percent to a 22-month low.
Pelts were one of nine commodities for which prices fell; the prices of six rose, led by kiwifruit, which went up by eight percent to a record.
For once, dairy prices were not responsible for the overall decline. Prices of skim and whole milk powder, cheese and butter rose between 0.4 and 0.7 percent.