Please review my IELTS essay. Thank you!

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My essay:

The column chart compares the number of years at school male and female adults took from 2000 to 2010, while the pie charts show the percentage of people achieving four types of qualifications: secondary school, college, diploma, and university degree in 2000 and 2010.

Overall, both genders saw an increase in the number of years studying at school, although male took more years than female in all those years. Furthermore, while the quantity of people graduating secondary school and college decreased after 10 years, there was an opposite trend with that owning diploma and university degree.

In the bar chart, male adults spent around 7.5 years to study, while female adults took 2 years less than male, at 5.5 years. The number of years at school of male and female rose gradually in 10 years, to 9 years and approximate 8 years respectively.

In 2000, the shares of four highest achievements were nearly the same, at around over 20% for each. In particular, there was the biggest share of percentage of people earning secondary school qualifications, at 27.7%, whereas 21.8%, the smallest quantity, belonged to university categories. However, in 2010, the proportion of people graduating from university and secondary school reversed, at 44.5% compared to 8%.

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