Consider the following for the next four (04) items that follow : The following Pie-Charts show the percentage of different categories (A, B, C, D, E and F) of employees in a company in the year 2019 and 2020. The total number of employees was 4000 in 2019 and 5000 in 2020. (2019: A 20%, B 6%, C 10%, D 15%, E 27%, F 22%. 2020: A 21%, B 10%, C 11%, D 9%, E 27%, F 22%.) What was the percentage increase of category-E employees in 2020 as compared to that in 2019 ?