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Ancestor coverage table

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The table below counts the number of direct lineal ancestors about whom some information is known (the count is inaccurate for the remotest medieval generations, where not all lines have been entered into the GEDCOM file from which this count was generated, and no ancestors beyond the 21st generation, which includes Edward III and Philippa of Hainault, have been entered).

Ancestor Coverage Table for Henry, Ruth Kendrick, and Elizabeth Emily Churchyard by generation:

The following are the meanings of the terms in the chart ("Diff" and "Unique" are only given when different from "Found"):

"Total"
the total number of potential ahnentafel slots in a generation (always a power of 2).
"Found"
the number of ahnentafel slots actually filled in each generation.
"Diff."
the number of different individuals in each generation (a single individual may fill more than one slot, due to cousin internarriage in more recent generations).
"Unique"
the number of new individuals in each new generation (who are not also present in any more recent generation). When "Unique" is different from "Diff", this is due to intermarriage between "removed" cousins of different generations in more recent generations.
"Percentage"
the ratio "Found"/"Total", expressed as a percentage.

Gen  Total       Found    Diff.   Unique   Percentage

0    1              1                        100.00 %
1    2        	    2                        100.00 %
2    4        	    4                        100.00 %
3    8        	    8                        100.00 %
4    16       	   16                        100.00 %
5    32       	   30                         93.75 %
6    64       	   44       42                68.75 %
7    128      	   60       56                46.87 %
8    256      	   90       82                35.15 %
9    512      	  124      112                24.21 %
10   1024     	  149      139       135      14.55 %
11   2048     	  172      166       152       8.39 %
12   4096     	  119      113        99       2.90 %
13   8192     	   49       47        42       0.59 %
14   16384    	   25       25        24       0.15 %
15   32768    	   15                          0.04 %
16   65536    	   10                          0.01 %
17   131072   	    6                          0.00 %
18   262144   	    9                          0.00 %
19   524288   	   10                          0.00 %
20   1048576  	   11                          0.00 %
21   2097152  	    5                          0.00 %

All               959                871


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