Frequencies for first 10,000 rows of whocomp variable in nhamcsed1999 dataset :

who completed the patient record forms? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         Hospital staff |      4,413       44.13       44.13
Census Field Rep - Abstract during rep  |        170        1.70       45.83
Census Field Rep - Abstract after rep p |      4,758       47.58       93.41
            Multiple categories checked |        527        5.27       98.68
                                Unknown |        132        1.32      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016