Your comments

Thanks for the info, it really explains how it's done.

But I'm still confused why HUM sales would show as N/A. As far as I can see it should be possible to calculate a growth rate. 

For example, it would seem from the above table,  the 3 year CAGR for sales would be 53.77B/48.50B ^ (1/3) - 1 = 3.5% since both beginning and ending figures are positive. Did I miss something? Maybe I misunderstand what Sales Percentage Change Growth TTM, 3 Yr Growth represents... 

Best Regards.