NIBRS Bias Crime Incidents by Age and Number of Offenders and Victims
		single victim	multple victims	single victim	multiple victims
		juvenile	juvenile	adult	adults	Total
single juvenile	Count	294	42	137	12	485
	Row %	60.6	8.7	28.2	2.5	100.0
	Col %	30.1	12.8	4.3	3.1	10.0
	Total %	6.0	0.9	2.8	0.2	10.0
multiple offenders with juvenile	Count	134.0	102.0	120.0	28.0	384.0
	Row %	34.9	26.6	31.3	7.3	100.0
	Col %	13.7	31.0	3.8	7.2	7.9
	Total %	2.7	2.1	2.5	0.6	7.9
single adult	Count	187.0	91.0	1363.0	141.0	1782.0
	Row %	10.5	5.1	76.5	7.9	100.0
	Col %	19.2	27.7	42.9	36.1	36.6
	Total %	3.8	1.9	28.0	2.9	36.6
multiple adult	Count	28.0	27.0	193.0	106.0	354.0
	Row %	7.9	7.6	54.5	29.9	100.0
	Col %	2.9	8.2	6.1	27.1	7.3
	Total %	0.6	0.6	4.0	2.2	7.3
single unknown	Count	309.0	51.0	1276.0	84.0	1720.0
	Row %	18.0	3.0	74.2	4.9	100.0
	Col %	31.7	15.5	40.2	21.5	35.3
	Total %	6.3	1.0	26.2	1.7	35.3
multiple unknown	Count	24.0	16.0	89.0	20.0	149.0
	Row %	16.1	10.7	59.7	13.4	100.0
	Col %	2.5	4.9	2.8	5.1	3.1
	Total %	0.5	0.3	1.8	0.4	3.1
	Count	976.0	329.0	3178.0	391.0	4874.0
	Row %	20.0	6.8	65.2	8.0	100.0
	Col %	100.0	100.0	100.0	100.0	100.0
	Total %	20.0	6.8	65.2	8.0	100.0
Source: NIBRS 1995-2000
Unit of Count - Incident (where the victim was an individual person and the victim's age was known - N = 4,874)