The graph shows the average COI of born puppies per year. The average COI was counted in eight generations, as the average pedigree has 7,3 complete generations. What was not counted? We didn’t take into consideration the dogs without parents (TI’s and other breeds), their impact on lowering the COI reflects in their progeny. Few words on reading the graph properly. As You can see the average COI of puppies born before 2002 was rapidly changing form year to year. This is because the overall number of puppies was small so even one litter could dramatically change the outcome. Since 2002 we see a constant raise in number of puppies born yearly, that is why the line doesn’t fluctuate so much.