The line graph illustrates the amount of water used for agriculture, industry and household across the globe during a century between 1900 and 2000. The table gives the data on water use by Brazil and the Congo in 2000.
It can cleary be seen from the graph that there were rising trends in using water for all three sectors. The largest quantity of water was used for agricultural purpose over the whole period, starting with about 500 km3 at the start of the period in question and rose gradually to 1000 km3 during the first half of the century. From this point, it dramatically increased, peaking at over 3000 km3 at the end of the period. With regard to the other two sectors, industry and household, the consumption levels were relatively low during the first three decades. But from that time onward, the figures steadily grew, reaching to about 1100 km3 and 400 km3 respectively.
Looking at the individual country, Brazilians consumed far more water than the Congo people. Brazil with 176 million population used 26,500 km3 while its counterpart with only 5.2 million people consumed only 100 km3 water for irrigation only. Similarly, the water consumption rate of a Brazilian was nearly 44 times higher than that of a person in the Congo, with 359 km3 and 8 m each.