ary 1981 at 156 shows a rise of 5.4 per cent as compared with a fall of 1.3 per cent during the comparable eight months of July 1979-February 1980. However, this increase is over a tow base; in fact, over the eight month period July 1978-February 1979, the increase in the latest eight month period works out to only 4.1 per cent.