FEDERAL RETURN DATA 
STATISTICAL
DISTRIBUTION OF AGI, PERSONAL EXEMPTIONS AND FEDERAL TAXES 
2001 

ALL 
SINGLE 
HEAD OF 
MARRIED 
MARRIED 



HOUSEHOLD 
JOINT 
SEPARATE 
ADJUSTED GROSS INCOME 





NUMBER OF NONMISSING
VALUES 
936,965 
392,528 
89,285 
442,471 
12,681 
THE MEAN 
$42,412 
$19,584 
$26,287 
$66,226 
$31,656 
THE SUM 
$39,738,939,853 
$7,687,260,749 
$2,347,022,511 
$29,303,226,440 
$401,430,153 
THE STANDARD DEVIATION 
$184,167 
$65,652 
$76,260 
$255,396 
$133,826 
THE UPPER QUARTILE 
$53,899 
$25,467 
$32,470 
$75,649 
$35,829 
THE MEDIAN 
$27,958 
$13,054 
$20,881 
$51,259 
$21,618 
THE LOWER QUARTILE 
$12,169 
$5,531 
$12,712 
$31,420 
$10,924 
THE 90TH PERCENTILE 
$84,097 
$41,490 
$48,094 
$108,579 
$53,435 
THE 10TH PERCENTILE 
$4,495 
$2,309 
$7,079 
$17,773 
$4,624 












PERSONAL EXEMPTIONS 





NUMBER OF NONMISSING
VALUES 
936,965 
392,528 
89,285 
442,471 
12,681 
THE MEAN 
2.25 
0.78 
2.58 
3.51 
1.45 
THE SUM 
2,106,532 
306,279 
230,218 
1,551,608 
18,427 
THE STANDARD DEVIATION 
2 
1 
1 
2 
1 
THE UPPER QUARTILE 
3 
1 
3 
4 
2 
THE MEDIAN 
2 
1 
2 
3 
1 
THE LOWER QUARTILE 
1 
0 
2 
2 
1 
THE 90TH PERCENTILE 
5 
1 
4 
6 
3 
THE 10TH PERCENTILE 
0 
0 
2 
2 
1 












FEDERAL
INCOME TAX 





NUMBER OF NONMISSING
VALUES 
936,965 
392,528 
89,285 
442,471 
12,681 
THE MEAN 
$4,854 
$2,173 
$1,710 
$7,876 
$4,543 
THE SUM 
$4,548,147,289 
$852,992,741 
$152,646,523 
$3,484,900,210 
$57,607,815 
THE STANDARD DEVIATION 
$40,414 
$14,457 
$14,135 
$56,287 
$40,575 
THE UPPER QUARTILE 
$4,312 
$2,396 
$1,796 
$6,907 
$3,341 
THE MEDIAN 
$1,391 
$583 
$41 
$3,140 
$1,414 
THE LOWER QUARTILE 
$0 
$0 
$0 
$432 
$141 
THE 90TH PERCENTILE 
$9,678 
$4,862 
$4,109 
$14,678 
$7,563 
THE 10TH PERCENTILE 
$0 
$0 
$0 
$0 
$0 





