Frequencies for division variable in impact2004 dataset :

     Census |
   Division |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        169        4.09        4.09
          2 |        461       11.14       15.23
          3 |        640       15.47       30.70
          4 |        615       14.87       45.56
         40 |         51        1.23       46.80
          5 |        386        9.33       56.13
          6 |        432       10.44       66.57
          7 |        606       14.65       81.22
          8 |        267        6.45       87.67
          9 |        510       12.33      100.00
------------+-----------------------------------
      Total |      4,137      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016