The given pie charts provide the data about the proportion of the water used in different purposes in Sydney, Australia over a decade since 1997.
Overall, it is obvious that the figures for three in 5 sectors were food, building, manufacturing industries experienced a downward trend, while the others witnessed a opposite trend. Moreover, it is noticeable that the food industry and building industry sequence occupied the first and the bottom position of the charts among the period.
To be specific, in 1997, with approximately 48%, the food industry accounted for the largest ratio among 6 causes to use water in this place. Despite still being the industry with the largest proportion, by 2007, this industry had a slight decrease to 41%. Moreover, in the same period, manufacturing and building industries also experienced a downward trend from 5% to 2% in building and from 15% to 11% in manufacturing.
In contrast, the others witnessed an upward trend. It is noticeable that in 1997, the service industry was only 13% but in the following 10 years, this figure reached second place with 25%. Moreover, household use rose 2% from 19% to 21%.