In the two tables for colts and fillies, the percentages on the topline show the distribution across all bins for the racing population as a whole.

An analysis of Graded winners shows that the second highest rating bin (90 upwards) is a minimum requirement for Gr1 and Gr2 winners, and to a large degree also Gr3 winners (the latter category features many handicaps, where lowly rated horses are able to beat the better ones).

Taking the male offspring (see table for colts), 2% falls in the top-bin (>99), 5% in the second highest bin (90-99), which together make for 7%. If the 13% from third highest bin (80-89) is added (the minimum for Listed and multiple winners) the combined rounded off total gets to 19%.

Looking at the bottom bin (<59, the likely non-winners), the population average is a scary 32% – one in three.

In the table, the six bins are shown together with two columns which add the two top-bins (AR>89, black type candidates), and three top-bins (AR>79, useful winners). Also added is the total number of rated horses (by sex), from which the bin percentages are calculated – the larger the number, the more reliable the percentages.

All this represents what can be expected, on average, from the colts produced by the sires in the table. The top-bins as well as the bottom ones help construct an informative picture. The bin-ratings for fillies (see table for fillies) are on a lower level than the colts, by 5 pounds (it equates the sex allowance).