The bar chart compares the levels of water storage in six different Australian cities in October of 2009 and 2010.
Overall, it is clear that there was a broadly upward trend across all countries, with the exception of Darwin, which experienced a downward trend. Canberra consistently maintained the highest proportions over the entire timeframe and closely followed by Sydney. Notably, the figures of Brisbane remained unchanged from the previous year.
Starting with the downward and unchanged trends, in 2009, the percentage of Darwin was approximately 45, but it dropped significantly to about 38%, making it the only city that showed decrease in graph. Brisbane did not see any change in shares, constituting for just over a half in both years, respectively.
With regard to increasing patterns, by the end of the period, Canberra continued the lead, reaching a peak of nearly 100 percent. This was distantly followed by Sydney, increasing from around 75% in 2009 to 80% in the latter year. As for the remaining countries, the water levels of Perth in October of 2009 were around two fifth and after a year, it went up by 20 percent. When it comes to Melbourne, at the initial year, it stood at a quarter and then grew substantially to almost 40% in 2010.