High school and college students like reading e-books and read 18 e-books on average each year, e-book service provider iReader said in its report on digital reading. Beijing, Shanghai and Shenzhen are the top three cities for people willing to spend time and money(on e-books, whose market revenue tops US$1.4 billion annually in China). 68% of digital readers are young people under 25, the report said. However, office workers are the ones more willing to spend time and money on e-books. On average, readers with 10 years of work experience spend 51 minutes a day and 145 yuan a year on e-books, compared to 36 minutes a day and 72 yuan a year of college students, according to the report.