What is the pie chart meant to represent? Pie charts display percentages - so that you display what percentage or proportion of a total of 100% is represented by each category.
In your example does the total represent the number of games? For instance - you have two records for darts for Jacob and one record for golf for Jacob. In which case the chart would show two thirds as darts and one third as golf?
If you are trying to chart something else you will need be more specific about what you are trying to achieve.
Thank you for getting back to me, the holiday season prevented me from responding when I should have. I already had this question answered a few days before you got back to me here: http://stackoverflow.com/questions/34404543/filemaker-pro-14-calculating-pie-graph-axes