The bar chart shows the requests for one-on-one help in using four different types of technology. Summarize the information by selecting and reporting the main features. Write about 150 words.

The given bar chart provides information about the demanding of using four various types of technology equipments as percentage in a first period of ten years. Overall, Computer was the most popular equipment that people use in 2000 while printer took up the lowest one. During the course of the year 2010, digital camera and cellphone were responsible for the most and the least significant proportion of total requests, respectively. According to the bar chart, during the first ten years, the ratio of requisition for the computer occupied the most considerable, approximately 35 %. Followed by that is the cell phone, which was around 25 % in the percentage of one-to-one help requested. Digital camera was roughly about 23%. Printer was the lowest proportion of consuming demand, about 15%, it was a two-time gaps when comparing with the computer. It can be seen that until the end of the period, digital camera underwent a dramatical progress in the overall volume of using equipments, around 20% in 2000 and 45 % in 2010, respectively. The opposite pattern can be seen on cell phone, which expericend a considerable fall in the total proportion of user expenditure, from 25% to about 7%. The percentage of requests in Computer and Printer witnessed a slight decrease, which were roughly 30% and approximately 13 %.