Frequencies for first 10,000 rows of occp_cod_num variable in demo2006q2 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      1,320       13.20       13.20
                   LW Lawyer |      1,846       18.46       31.66
                MD Physician |      3,745       37.45       69.11
OT Other health-professional |      1,252       12.52       81.63
               PH Pharmacist |        587        5.87       87.50
                           . |      1,250       12.50      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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