How to decrease size between Columns without using inner padding or minimum Category width

[Trupti_D]

I have a stacked column chart placed on height of chart is 440 and width is 1260, on x-axis of chart distributed in 12 different category. Inner padding applied is 40 and category width 70. Now I want to keep this padding and category width but I want to decrease distance between two columns. Page width is 1280. Below this chart I have added table showing data for each category on x-axis. How can I reduce distance between two columns?