The bar graphs present data about the performance of a particular bus company, with regard to its buses arriving on time, and how many complaints were made by passengers in five succeeding years.
Overall, the target rate of buses arriving on time declined each year, while the actual rate fluctuated but generally exceeded the target rate. Meanwhile, the number of complaints from passengers increased with some fluctuations in those years.
In 1999, about 82% of buses arrived on time, and this was about 2% higher than the target figure. In addition, the percentage of actual busses arriving punctually fell to around 30% after a year, which was about 10% lower than the expected rate. This figure rose again by about 12% in 2001, similar to that in 2002, whereby the expected rate was moderately lower than the actual by about 2%. Subsequently, this rate went up to just under 80% by 2003, which was more than two times higher than the target proportion.
Meanwhile, in the initial year, the number of complaints made by passengers was about 60, and it jumped to about 90 after a year before experiencing a slight decrease in 2001. Later, the figure went up steadily, recording around 120 complaints in this bus company in 2003.