Frequencies for first 10,000 rows of econdp_1 variable in mort1975 dataset :

   econdp_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,948       99.48       99.48
          2 |         45        0.45       99.93
          3 |          1        0.01       99.94
          5 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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