Frequencies for first 10,000 rows of econdp_8 variable in mort1975 dataset :

   econdp_8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.02        0.02
          2 |          3        0.03        0.05
          3 |          9        0.09        0.14
          4 |         12        0.12        0.26
          5 |        138        1.38        1.64
          . |      9,836       98.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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