The chart below shows the percentage of river water in UK rivers that is classified as having good chemical quality between 1990 and 2002.

The provided line graph gives information about the

rate

of river water in the Uk ( Wales, Scotland, Northern Ireland and England) that are classified as having good chemical

quality

from 1990 to 2002. The units are measured in percentages.

Overall

, the

rate

of chemical

quality

in water in Wales and Scotland witnessed an opposite trend and stagnated almost unchanged during the

period

given. The same share for Northern Ireland and England fluctuated over the span given. In 1990 the

rate

of chemical

quality

in Wales was just above 95% and stayed unchanged till 1998. From 1998

this

figure declined dramatically

till

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85%. The same share for Scotland

also

stagnated till 1999 (95%) .

This

figure

rised

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rises

rose

raised

significantly till 99% in 2000 and stayed unchanged till the end of the

period

. A dramatic decline from 93%

till

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to

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85% was the case

on

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in

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the percentage of chemical

quality

in Northern Ireland between 1990-1992.

This

index

rised

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rose

raised

rises

sharply and reached a high of 96% in 1994.

Then

this

share plummeted to 82% in 1996 and increased significantly to 96%

in

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at

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the end of the

period

. The same figure for England was 82% in the initial year and

rised

Correct your spelling

rose

till

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to

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85% in 1994 and declined

till

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to

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89% in 1998.

This

rate

than

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then

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increased sharply to 90% and stayed unchanged till the end of the

period

.