Sentence:  Total average <WSD>circuities</WSD> for the years 1947 and 1950 were estimated as 14 and 13 per cent, respectively, and the overall circuity for the commodity groups in 1947 was 13 per cent for products of agriculture, 8 per cent for animals and products ... 
Meaning of the word marked with <WSD> tags:  A measure of the ratio of (road) miles to (air) miles between two locations.