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 given graph compares the chemical

quality

of UK river

water

in certain parts between 1990 and 2002

Overall

, the proportion of

water

quality

in most regions increased over the period, apart from Wales, in which, there was an extremely significant fluctuation in the

percentage

of that of Northern Ireland. In terms of

water

quality

in Wales and Scotland, the two figures were the highest, at both around 95%, at the starting year, at about 97% and 94%, respectively. These two figures

then

both remained unchanged

in

Change preposition

for

show examples

most of the time until 1998, when that of Wales decreased

graddually

Correct your spelling

gradually

to approximately 93%, the

percentage

of that of Scotland,

on the contrary

, increased to reach its peak at around 98% in 2000 and stayed stable in the

last

two final years. Regarding the

percentage

of river

water

quality

in Northern Ireland and England, the figure of that

of of

Change preposition

for

show examples

Northern Ireland was

the

Correct article usage

apply

show examples

third at the beginning point, at a bit higher than 91%,

this

number

then

fluctuated in a very wide range in the

folloing

Correct your spelling

following

years and reached its bottom in 1996 before recovering to the beginning

percentage

and

then

continuosly

Correct your spelling

continuously

rose to reach the highest peak of all 4 areas in 2002. At that time, that

percentage

of England was the lowest, at about 82% in 1990,

this

figure fluctuated slightly between 1990 and 1998

,

Remove the comma

apply

show examples

and

then

reached its highest point at 90% in 2000 before

stayed

Wrong verb form

staying

show examples

unchanged in the final period.