Frequencies for first 10,000 rows of econdp_2 variable in mort1975 dataset :

   econdp_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,325       13.25       13.25
          2 |      6,479       64.79       78.04
          3 |        142        1.42       79.46
          4 |          3        0.03       79.49
          5 |      1,101       11.01       90.50
          . |        950        9.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015