Customizing Y axis tick values - bar chart

I'd like to customize what values are displayed on the Y axis for a bar chart. I have spent some time looking through the API documentation without finding any way to control this. 

Example: The Y axis range is 95 to 100. The default values displayed, for a MaximumNumberOfTicks of 2, are 95 and 100. I would like to change this so that the values displayed are 95 and 98 (at the appropriate positions along the Y axis).

Is there any way of achieving this?

(1) Answer