USA 2004- 1st Quarter (Number of Herds= 201)
Measurement	Mean	Upper 10 percentile	Lower 10 percentile
Average parity	2.71	3.4	2
Percent multiple matings	88.49	99.2	78
Percent repeat services	12.57	6	19
Ave non-productive sow days	59.41	37.6	85.2
Ave parity of culled sows	4.16	5.8	2.6
Ave parity of farrowed sows	3.66	4.4	3
Average age at weaning	18.08	15.5	20.5
Average female inventory	1415.95	2862.8	279.6
Average gestation length	115.39	116	115
Average gilt pool inventory	61.23	137.8	0.1
Average mummies per litter	0.28	0.1	0.5
Average pigs born alive/litter	10.38	11.2	9.5
Average stillborn pigs	0.97	0.5	1.4
Average total pigs per litter	11.63	12.6	10.7
Culling rate	42.36	24.2	62.5
Death rate	8.4	2.8	13.9
Entry - 1st service interval	30.01	0	66.7
Farrowing interval	148.18	141	156
Farrowing rate	73.78	86	58.3
Litters / female / year	2.32	2.5	2.1
Litters / mated female / year	2.43	2.6	2.3
Old lits / mated female / year	2.22	2.6	1.8
Old pigs wnd / Inv. female / y	19.29	23.1	15.2
Percent less than 7 born live	12.54	7.3	17.5
Percent sows bred by 7 days	87.36	95.1	79.1
Pigs weaned / lifetime female	35.01	50	22
Pigs weaned per litter weaned	9.1	10	8
Pigs weaned per sow	8.97	10	7.9
Pigs wnd / female / year	20.82	23.6	17.3
Pigs wnd / mated female / yr	21.81	24.8	18.6
PWM for farrowed and weaned	14.18	9.4	20.3
Replacement rate	49.61	18.8	75.3
Weaning - 1st service interval	6.96	5.3	8.6