The given bar chart illustrates the changes in water levels across six cities in Australia: Perth, Darwin, Canberra, Melbourne, Sydney, and Brisbane, between October 2009 and October 2010.
Overall, it is clear that water levels in Brisbane were higher than in the other cities during this period, while the opposite was true for Perth and Melbourne. Additionally, Perth experienced a downward trend in water levels throughout 2010.
In 2009, the average water level in Brisbane was approximately 75%. This figure increased dramatically to 100% in 2010, making it the highest point on the chart. Darwin had the second highest water level, which remained stable over the two years, while Canberra peaked at 50%, showing a significant increase of 23% in 2010.
In contrast, Perth experienced a decrease, with water levels at 51% in 2009, nearly double that of 2010. In Sydney, water levels remained unchanged at 49% over the two-year period. Melbourne saw a minimal increase in water levels, rising from 35% to 45%.
