The provided bar graph compares how many patients were treated by four different hospitals in one city between September and December in 2012.
Overall, what stands out is that there was an increase in number of patients admitted to hospital A and B throughout the given period, while that of Hospital C and D declined. Of particular note is that Hospital A always welcomed the highest number of patients.
Looking at the upward trends first, 12,000 patients visited Hospital A in September, which rose gradually in the following two months, first to 13,000 in October and then reached its peak in November with 14,000 patients admitted.
Turning to the downward trends, number of patients in Hospital C went down constantly over the given timeframe. Initially, there was a drop from 10,500 to 10,000 from September to October and continued to fall, eventually hitting the lowest point of 8,500 in December. Regarding Hospital D, it experienced a steady decline from 5,000 in September to 3,500 in November. But, the number of welcomed patients recovered to 4,300 by the final month.