Gets a ratio of wide to draw the columns 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 column's available space. The actual column width used is the smaller of the columnWidthRatio property and the maxColumnWidth property. Clustered columns divide this space proportionally among the columns in each cluster. The default value is 0.65.
'Declaration
Protected Read Property columnWidthRatio As Double