Frequencies for division variable in impact1997 dataset :

     Census |
   Division |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        213        4.08        4.08
          2 |        519        9.93       14.01
          3 |        767       14.68       28.69
          4 |        787       15.06       43.75
         40 |         53        1.01       44.77
          5 |        442        8.46       53.22
          6 |        728       13.93       67.16
          7 |        731       13.99       81.15
          8 |        359        6.87       88.02
          9 |        626       11.98      100.00
------------+-----------------------------------
      Total |      5,225      100.00

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