The data about educational background of Bulgarian Inhabitants who wanted to stay abroad

The bar chart provides data about educational background of Bulgarian Inhabitants who wanted to stay in abroad in 2002, 2006, and 2008. Overall, most of people had secondary education, and the percentage are almost tripled in 2002 and 2006 compared with others. In addition, while higher education had unstable trend, primary and lower had positive change each year.

It is clear that middle education had the highest number in 2002, 2006, 2008 at 65 percent, 61 percent, and 59% respectively. It's also only had a slight decrease each year, four percent fall in 2006, and downward by two percent in 2008.

Besides, the number of higher education had fluctuate trend because after went up from 17 percent in 2002 to 20 percent in 2006, it decreased by more than half into 9 percent. In contrast, elementary education rose from year to year from a very little upward in 2006, just one percent higher than before to 32 percent in 2008.

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Hi Faiz.
These are my few corrections for your writing.
Please, review them.

... who wanted to stay in abroad in 2002, ...
Overall, most of people had secondary education(It's not clear) IT IS IMPORTANT TO NOTE CITIZENS GRADUATING FORM THE SECOND SCHOOL DOMINATED IN THE PERCENTAGE OF PEOPLE GOING ABROAD, and the percentage are almost tripled(Avoid the detailed information in the overview) in 2002 and 2006 ...

... higher education had AN unstable trend, ...

... middle education had BY FAR the highest number in ...
It's(Never ever ever make contraction in the formal writing) also only had a slight decrease (...) downward by two percent in 2008. (You still describe safely. You have to remember that your job in the writing task 1 is to compare the figures, not describe separately)

Besides ON THE OTHER HAND, the number of higher education (Not the school, but people/ citizens. Please, make you sure that what you write is what you mind) THE PERCENTAGE OF STUDENTS WHO FINISHED THE THE HIGHER SCHOOL AND WANTED CONTINUING THEIR ACTIVITY IN ANOTHER COUNTRY had fluctuate trend because (...) 20 percent in 2006, AND it decreased by more than half in to 9 percent IN THE LAST TIMELINE. In contrast, THE FIGURE OF THE elementary education rose ...