Frequencies for first 10,000 rows of occp_cod_num variable in demo2004q3 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      1,672       16.72       16.72
                   LW Lawyer |        141        1.41       18.13
                MD Physician |      3,520       35.20       53.33
OT Other health-professional |      1,918       19.18       72.51
               PH Pharmacist |        763        7.63       80.14
                           . |      1,986       19.86      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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