Frequencies for first 10,000 rows of occp_cod_num variable in demo2007q2 dataset :

                occp_cod_num |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                 CN Consumer |      2,091       20.91       20.91
                   LW Lawyer |        460        4.60       25.51
                MD Physician |      3,656       36.56       62.07
OT Other health-professional |      1,813       18.13       80.20
               PH Pharmacist |        725        7.25       87.45
                           . |      1,255       12.55      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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