FEDERAL RETURN DATA |

2000 |

| ALL | SINGLE | HEAD OF | MARRIED | MARRIED |

| | | HOUSEHOLD | JOINT | SEPARATE |

ADJUSTED GROSS INCOME |

NUMBER OF NONMISSING VALUES | 929,143 | 398,530 | 86,485 | 431,706 | 12,422 |

THE MEAN | $43,005 | $19,288 | $25,928 | $68,619 | $32,662 |

THE SUM | $39,957,937,462 | $7,686,705,062 | $2,242,358,256 | $29,623,141,457 | $405,732,687 |

THE STANDARD DEVIATION | $215,578 | $113,178 | $66,729 | $292,085 | $162,203 |

THE UPPER QUARTILE | $52,955 | $24,625 | $31,795 | $74,790 | $35,406 |

THE MEDIAN | $27,133 | $12,485 | $20,336 | $50,831 | $21,448 |

THE LOWER QUARTILE | $11,558 | $5,198 | $12,294 | $31,383 | $10,406 |

THE 90TH PERCENTILE | $83,028 | $40,567 | $47,096 | $108,669 | $52,933 |

THE 10TH PERCENTILE | $4,187 | $2,163 | $6,788 | $17,917 | $3,952 |

PERSONAL EXEMPTIONS |

NUMBER OF NONMISSING VALUES | 929,143 | 398,530 | 86,485 | 431,706 | 12,422 |

THE MEAN | 2.21 | 0.75 | 2.56 | 3.51 | 1.45 |

THE SUM | 2,055,743 | 299,280 | 220,982 | 1,517,425 | 18,056 |

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 | 929,143 | 398,530 | 86,485 | 431,706 | 12,422 |

THE MEAN | $5,434 | $2,291 | $1,874 | $9,055 | $5,188 |

THE SUM | $5,048,767,802 | $913,163,445 | $162,082,306 | $3,909,078,041 | $64,444,010 |

THE STANDARD DEVIATION | $81,844 | $17,253 | $13,035 | $118,428 | $44,820 |

THE UPPER QUARTILE | $4,386 | $2,374 | $1,944 | $7,159 | $3,425 |

THE MEDIAN | $1,549 | $731 | $261 | $3,371 | $1,564 |

THE LOWER QUARTILE | $39 | $0 | $0 | $794 | $213 |

THE 90TH PERCENTILE | $9,905 | $4,841 | $4,169 | $15,251 | $7,573 |

THE 10TH PERCENTILE | $0 | $0 | $0 | $0 | $0 |