Please review my IELTS writing task 1

Topic: The pie charts below show the online shopping sales for retail sectors in New Zealand in 2003 and 2013. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The pie charts show the sales made through the Internet for four different retail sectors, namely travel, films and music, books, and clothes in 2003 and 2013.

Overall, none of the categories had a dominant position in internet shopping in either year, as their share of online sales each was invariably below two fifths. Still, books, and films and music grew in popularity among online consumers, while travel and clothes became less attractive.

In 2003, travel accounted for the largest percentage of online sales at 36%, followed by clothes at 24%. However, their numbers declined to 29% and 16% respectively in 2013. By comparison, the online sales of films and music rose by more than half, from 21% of the total in 2003 to 33% in 2013, the highest percentage of any retail sector. A smaller increase took place in the share of books, up by less than one sixth from 19% in 2003 to 22% in 2013.