CSS仅为表格行宽度的百分比设置背景颜色

I have a basic table with two columns: name and value. I'd like to shade each row in the table an appropriate percentage of the width based on the size of the value (to essentially create a sideways histogram!). I can write code to calculate the appropriate percentage to set, but I can't figure out the CSS to actually shade each row appropriately. It seems like the whole row can be shaded, but not a percentage. Is that true?I have a basic table with two columns: name and