Animation of bar charts in Microsoft Excel and Powerpoint

I have quarterly data for no. Patients and I have to make a bar chart, I want to set the animation so as to display the most recent bar first and to the right of the graph, then the bars of all the other neighborhoods together. I've solved this recent issue and then all the bars appearing at once, but PowerPoint launches the animation by first displaying the leftmost bar by default. Now, if someone can help bring up the rightmost bar first, I see no way out!
Thank you!