Table 1.

Animal numbers from 16 institutions’ annual reports.

Institution	RM annual use	AWA “animals” 2017–18	RM %	RM average daily inventory	RM annual use-to-daily inventory
1	1,050,391	8855	99.2
2	592,037	1819	99.7	52,849	11.7
3	480,457	2222	99.5
4	296,947	1596	97.3	199,552	1.5
5	192,220	1762	99.1	56,787	3.4
6	568,718	1308	99.8
7	336,234	736	99.8	116,211	2.9
8	250,172	1142	99.5	96,170	2.6
9	305,171	4014	98.7	65,278	4.67
10	77,300	112	99.9
11	389,107	466	99.9
12	91,722	1714	98.1	61,945	1.5
13	133,243	566	99.6
14	306,078	5698	98.1	14,079	21.7
15	254,731	6407	97.5	254,847	1
16	236,296	607	99.7	111,404	2.1
Total	5,560,824	39,024	99.3	1,029,122	5.4

“RM annual use” the annual reports to AAALAC-International, which institutions shared with the author. “AWA ‘animals’” are publicly available from the United States Department of Agriculture. “RM %” is the percentage of an institutions AWA animals plus annual RM use that is RM. “Rat-Mouse average daily inventory” obtained via Freedom of Information request to the National Institutes of Health Office of Laboratory Animal Welfare; the numbers on those reports do not specify whether it is the number of cages, the counted number of animals, or an estimate of the number of animals based on the standing inventory of cages.