TABLE 2.

Example of Data Inconsistency

	1987			1988			1989
		People (With			People (With			People (With
Organizations	People, n	Valid Hours), n	Hours	People, n	Valid Hours), n	Hours	People, n	Valid Hours), n	Hours
Insurance company #1							2	2	25,463
Utilities company #2	12	12	1,386
Asbestos company #3	341	338	29,550	49	49	2,804	751	728	48,908
Board of education #4							6	6	12,000
Board of education #5	9	9	184	8	8	50	2	2	6
Construction company #6	13	13	5,429	12	12	1,611	24	23	2,569
School board #7	23	23	6,853	60	60	49,445	189	189	338,664
Utilities company #8	6	6	2,080				1	1	400
University #9							258	258	6,745
Government service #10							14	14	14,000
Construction company #11							35	35	1,588
Construction company #12	86	83	8,187				64	64	6,880
Construction company #13	383	343	32,128
Construction company #14	3	3	6,003				43	43	1,928
Manufacturing company #15	19	19	3,251	3	3	300	96	96	6,941
Manufacturing company #16	29	29	3,100	20	20	598	31	31	2,289
Board of education #17							686	685	1,370,000
University #18	55	55	1,149	32	32	449	40	40	580
Asbestos company #19	15	15	1,977
Board of education #20	13	13	10,564	1	1	13	1	1	325
Board of education #21							10	10	20,000
Utilities company #22	13	13	1,872
Construction company #23				14	14	4,813	56	56	16,399
	Percentage of Grand Total
All schools	2.8	2.9	5.0	2.1	2.1	11.9	19.9	20.1	70.2
14 most common companies (excluding schools)	25.8	25.2	25.3	2.0	2.1	2.4	18.4	18.2	4.5
Grand total	3,563	3,466	375,639	4,860	4,738	421,282	6,000	5,926	2,491,571