Frequencies for first 10,000 rows of occp_cod_num variable in demo2007q4 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      3,226       32.26       32.26
                   LW Lawyer |        341        3.41       35.67
                MD Physician |      3,010       30.10       65.77
OT Other health-professional |      1,571       15.71       81.48
               PH Pharmacist |        433        4.33       85.81
                           . |      1,419       14.19      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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