The given graphs illustrates the water levels in reservoirs of six different cities in Australia from October 2009 to the same month next year.
Overall, these cities experienced a fluctuation over a 1 year period except for Brisbane still remained the same proportion. While the other 5 cities followed the same upward trends, Darwin tended to follow the opposite.
Analyzing into the year of 2009, starting off with nearly 80 percent of the level of water in reservoirs belonged to Sydney, in which the number was doubled and higher than the number in Perth, which was 40 percent. Just over 75 percent of water level in Canberra, it had helped them held the second highest in 2009. Melbourne was the lowest when the proportion just passed 20, while this number was tripled in Brisbane and only a half of Darwin’s.
A year went by and the new data witnessed a considerable change in number. In 2010, surpassing Sydney was Canberra where the proportion had went up to just beneath 100, raised 20 percent higher than the previous year and made it the highest among the cities. Following the same pattern with Canberra, Melbourne’s and Perth’s had significantly risen with ones doubled and ones grew over 25 percent compared to the past. Sydney was found to slightly increased a small amount and reached just over 80 percent. Ultimately, Darwin saw a decline in number when a sudden drop of nearly half of the percentage had dragged this city to the bottom in 2010.