Frequencies for first 10,000 rows of occp_cod_num variable in demo2009q4 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      3,642       36.42       36.42
                   LW Lawyer |        337        3.37       39.79
                MD Physician |      2,733       27.33       67.12
OT Other health-professional |      1,691       16.91       84.03
               PH Pharmacist |        527        5.27       89.30
                           . |      1,070       10.70      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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