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The image displays a line graph titled "River Water Quality in the UK" tracking data from 1990 to 2002 for Wales, Northern Ireland, England, and Scotland. The y-axis ranges from 0 to 100%, marked at intervals of 10, and represents "Good chemical quality %". Data for each region shows: Wales starting near 95% in 1990, peaking just below 100% around 1994, dipping slightly in 1996, and stabilizing near 95% in 2002. Northern Ireland begins around 60% in 1990, shows a sharp improvement to nearly 90% by 1994, sees a sharp drop back to 60% in 1996, recovers to around 90% by 1998 and 2000, dropping sharply again by 2002. England starts just above 70% in 1990, dips slightly below during the mid-90s, and climbs back to just above 70% by 2002. Scotland begins just under 90% in 1990, experiences a gradual decrease to about 80% by 2002. The graph uses distinct line styles for each region, plotted on a horizontally-oriented rectangular plot area with a grid.
Given the complexity of the image, the above description may not be entirely accurate.
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The line graph presents the percentage of river water classified as having good chemical quality in four regions of the UK: Wales, Northern Ireland, England, and Scotland, from 1990 to 2002.
In 1990, Wales had the highest percentage of river water with good chemical quality, starting at approximately 95%. This figure remained unchanged until 1996, after which it decreased significantly to 80% by 2002. Conversely, the proportion of river water achieving good chemical standards in Northern Ireland stayed stable at 85% until 1996, before increasing slightly to 95% in 2000 and remaining at that level until 2002.
The percentage of good quality river water in Scotland rose gradually from 20% to 30% between 1990 and 1996. This figure then increased dramatically, reaching a peak of 50% in 2000, followed by a drop to 40% in 2002.
Meanwhile, England’s high-quality water percentage fluctuated considerably throughout the period. It rose dramatically from 54% to 60% between 1990 and 1996. However, the figure dropped considerably to its lowest point at 30% in 1998. In the remaining years, it recovered to nearly 50% in 2002, slightly higher than its starting point in 1990.
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