Frequencies for first 10,000 rows of occp_cod_num variable in demo2004q1 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      1,724       17.24       17.24
                   LW Lawyer |         54        0.54       17.78
                MD Physician |      3,425       34.25       52.03
OT Other health-professional |      1,645       16.45       68.48
               PH Pharmacist |      1,104       11.04       79.52
                           . |      2,048       20.48      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015