Frequencies for n2 variable in countymd1989 dataset :

  Number of |
 exemptions |
    1040:6d |      Freq.     Percent        Cum.
------------+-----------------------------------
     15,506 |          1        4.00        4.00
     17,244 |          1        4.00        8.00
     23,762 |          1        4.00       12.00
     24,263 |          1        4.00       16.00
     27,776 |          1        4.00       20.00
     28,068 |          1        4.00       24.00
     30,257 |          1        4.00       28.00
     35,276 |          1        4.00       32.00
     50,207 |          1        4.00       36.00
     61,778 |          1        4.00       40.00
     65,854 |          1        4.00       44.00
     66,899 |          1        4.00       48.00
     67,684 |          1        4.00       52.00
     95,900 |          1        4.00       56.00
    105,927 |          1        4.00       60.00
    124,229 |          1        4.00       64.00
    139,491 |          1        4.00       68.00
    172,307 |          1        4.00       72.00
    173,087 |          1        4.00       76.00
    402,553 |          1        4.00       80.00
    585,577 |          1        4.00       84.00
    648,255 |          1        4.00       88.00
    683,990 |          1        4.00       92.00
    718,381 |          1        4.00       96.00
    4364271 |          1        4.00      100.00
------------+-----------------------------------
      Total |         25      100.00

by Jean Roth , jroth@nber.org , 23 Jun 2017