Frequencies for first 10,000 rows of occp_cod_num variable in demo2004q4 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      2,469       24.69       24.69
                   LW Lawyer |        179        1.79       26.48
                MD Physician |      3,296       32.96       59.44
OT Other health-professional |      1,483       14.83       74.27
               PH Pharmacist |        856        8.56       82.83
                           . |      1,717       17.17      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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