Gets how wide to draw the bars relative to the category width, as a percentage in the range of 0 to 1.
A value of 1 uses the entire space, while a value of 0.6 uses 60% of the bar's available space. The actual bar width used is the smaller of the barWidthRatio property and the maxbarWidth property Clustered bars divide this space proportionally among the bars in each cluster. The default value is 0.65.
'Declaration
Protected Read Property barWidthRatio As Double