11.   The index measures air pressure differences between Tahiti in the Pacific Ocean and Darwin on the Indian ocean.

12.   The index measures price increases for a specific list of consumer items.

13.   The index measures the cost to employers of wages and benefits.

14.   The index measures the New Zealand dollar against currencies of major trading partners.

15.   The indices measure the volume of loan applications mortgage lenders are receiving.

16.   The index measures four Latin American Brady bonds.

17.   The index measures the ratio of weight to height.

18.   The index measures the sentiment of consumers, who had for a long time underpinned the deteriorating American economy.

19.   The index measures Chicago-area activity only, but the area accounts for a significant part of the state economy.