The pie charts compare how much customers satisfied with the service in percentagewise in the years 2005 and 2010.
Overall, at the beginning of the period the customers who considered the service was excellent made up the smallest part of the chart, while content overviews about service was the largest segment. In comparison, at the end of the period good reviews became the largest rating segment and the people who regarded the service was very poor made the smallest part of the chart.
The proportion of excellent reviews of service commented by customers accounted for 5% in 2005, and increased more than five times to 28% in 2010. The percentage of customers regarding the service was good at 14% in 2005 and had a considerable growth of 25% in 2010.
Satisfactory, which comprised less than half of ratings of people in 2005, fell to 17% in 2010. At the beginning of the period, the proportions of the poor and very poor overviews were at 21% and 15%, and decreased to 12% and 4%, respectively after 5-year period.
