The provided pie chart depicts the percentage of customer service in four different categories: excellent, good, satisfactory, poor, and very good. The information is given for the years 2005 and 2010.
Overall, it is clearly seen that the ratio of coustomer service in excellent and good was increased between 2005 and 2010. In contrast, the percentage of coustomer service in satisfactory, poor, and very poor was decreased in the same period.
Looking at the pie chart in detail, in 2005, the proportion of coustomer service in satisfactory was at the highest position, at 45%. Similarly, it was followed by poor, with 21%. Likewise, it is noticeable that the next places were occupied by very poor and good, which accounted for only 15% and 14%, respectively. In contrast, excellent was at the bottom position, with 5%.
Analyzing the pie chart further, in 2010, on the one hand, the proportion of coustomer service was 39% and 28% in good and excellent, respectively. In contrast, the date show that the ratio of coustomer service was 17%, 12%, and 4% in satisfactory, poor, and very poor, respectively.