The line graph illustrates the total demand for four types of textiles between 1980 and 2015, measured in million tons.
Overall, the demand for all four types of fiber increased in value over the period, although to varying degrees. While polyester experienced by far the most dramatic growth, becoming the most needed fiber category. Cotton also rose substantially, albeit with several fluctuations, whereas cellulous and wool remained relatively low over the time.
The amount of polyester stood at around 6 million tons in 1980, after which its figure increased considerably to around 45 million tons by the early-20s, with a few fluctuations consequently. It then surged to just under 70 million tons by 2015. Cotton, in comparison, began at approximately 13 million tons in 1980 and fluctuated between 18 and 28 million tons until the early-20s, when its value stood at around 22 million tons. It then rose gradually and reached just over 30 million tons in 2015.
Cellulosic and wool, meanwhile, started at around 2 and 3 million tons, respectively. Their value then remained relatively stable until 1990, where both figures went on opposite directions. The former increased by 1 million tons by 2000, before declining to its initial level in the next year, and leveled off until the end of the period. The letter, in contrast, followed a moderate growth and finished at roughly 10 million tons in 2015.