Frequencies for first 10,000 rows of occp_cod_num variable in demo2007q1 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      3,152       31.52       31.52
                   LW Lawyer |        368        3.68       35.20
                MD Physician |      3,188       31.88       67.08
OT Other health-professional |      1,427       14.27       81.35
               PH Pharmacist |        629        6.29       87.64
                           . |      1,236       12.36      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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