USA 2004- 4th Quarter (N= 225)
Measurement	Mean	Upper 10 percentile	Lower 10 percentile
Average parity	2.72	3.50	2.00
Percent multiple matings	89.37	99.50	80.90
Percent repeat services	14.09	6.90	23.50
Ave non-productive sow days	63.45	39.00	93.20
Ave parity of culled sows	4.27	5.90	2.80
Ave parity of farrowed sows	3.68	4.40	3.00
Average age at weaning	18.59	20.70	16.10
Average female inventory	1359.92	2748.80	325.90
Average gestation length	115.29	116.00	114.00
Average gilt pool inventory	67.09	158.80	0.00
Average mummies per litter	0.24	0.10	0.40
Average pigs born alive/litter	10.33	11.20	9.50
Average stillborn pigs	0.92	0.60	1.30
Average total pigs per litter	11.49	12.40	10.50
Culling rate	44.37	25.20	63.50
Death rate	7.75	2.80	13.50
Entry - 1st service interval	29.92	63.50	0.00
Farrowing interval	147.04	141.00	152.00
Farrowing rate	73.25	84.60	57.90
Litters / female / year	2.28	2.46	2.08
Litters / mated female / year	2.39	2.53	2.16
Old lits / mated female / year	2.15	2.48	1.68
Old pigs wnd / Inv. female / y	19.08	22.70	14.50
Percent less than 7 born live	12.25	7.00	17.30
Percent sows bred by 7 days	85.75	93.90	76.40
Pigs weaned / lifetime female	36.74	50.00	23.00
Pigs weaned per litter weaned	9.10	9.90	8.30
Pigs weaned per sow	9.01	9.80	8.10
Pigs wnd / female / year	20.60	23.60	17.10
Pigs wnd / mated female / yr	21.58	24.50	18.40
PWM for farrowed and weaned	13.67	8.90	18.20
Replacement rate	51.77	17.20	79.20
Weaning - 1st service interval	7.47	5.50	9.80