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

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

whereas

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

tonnes

in 1970,

then

this

trend began to shoot up to 20

tonnes

in 1980, and continued to above 70

tonnes

in 2015. Other categories,

such

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

also

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

tonnes

in the other sources illustrated the highest number in

this

report, which was depicted in 2015.

On the other hand

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

tonnes

in the first year

,

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and experienced to increase gradually to 13

tonnes

in 1990. Unfortunately,

this

pattern did not

last

long

,

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and experienced to decrease,

then

rose again until the

last

period which was 15

tonnes

.