Frequencies for division variable in impact2000 dataset :

     Census |
   Division |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        201        4.01        4.01
          2 |        500        9.97       13.98
          3 |        738       14.71       28.69
          4 |        750       14.95       43.64
         40 |         52        1.04       44.68
          5 |        433        8.63       53.31
          6 |        692       13.80       67.11
          7 |        700       13.96       81.06
          8 |        355        7.08       88.14
          9 |        595       11.86      100.00
------------+-----------------------------------
      Total |      5,016      100.00

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