Frequencies for first 10,000 rows of occp_cod_num variable in demo2006q4 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      2,146       21.46       21.46
                   LW Lawyer |        205        2.05       23.51
                MD Physician |      3,503       35.03       58.54
OT Other health-professional |      1,583       15.83       74.37
               PH Pharmacist |        838        8.38       82.75
                           . |      1,725       17.25      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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