Frequencies for first 10,000 rows of whocomp variable in nhamcsed2000 dataset :

who completed the patient record forms? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         Hospital staff |      5,084       50.84       50.84
Census Field Rep - Abstract during rep  |         48        0.48       51.32
Census Field Rep - Abstract after rep p |      4,378       43.78       95.10
            Multiple categories checked |        463        4.63       99.73
                                Unknown |         27        0.27      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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