There is a direct correlation between Calendar Year and age of each person.  So let's say I have 5 people who will meet a particular condition in 2015.  All of those people will have an average age of 100.  Similarly in 2016, all the people will have an average age of 96.  Although I am using Calendar Year for the 'x' axis, I would like the legend to show the average age.  I store this in a separate field and can use it but don't know how to do that.  It seems like it should be simple, but I can't figure it out.  Thanks!