The graph below shows the changes in production (millions) of three products in a garment factory from 1990 to 2010.

The line chart depicts the alteration in creating fibres which were categorized into six sources and surveyed between 1990 to 2010 quinquennially.

Overall

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, all of the contributors indicated upward trends which were linear with the proportion of the population,

whereas

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only the production of cotton had a downward tendency. In detail, the number of polyesters was approximately 15

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in 1970,

then

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this

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trend began to shoot up to 20

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in 1980, and continued to above 70

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in 2015. Other categories,

such

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as non-cotton cellulosic, polyamides, polypropylene and other sources

also

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followed a similar pattern, which had a gradual rose from all over the period. 100

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in the other sources illustrated the highest number in

this

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report, which was depicted in 2015.

On the other hand

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, the proportion of cotton fluctuated slightly, which was only for around 11

tonnes

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in the first year

,

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and experienced to increase gradually to 13

tonnes

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in 1990. Unfortunately,

this

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pattern did not

last

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long

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and experienced to decrease,

then

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rose again until the

last

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period which was 15

tonnes

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.