Frequencies for first 10,000 rows of whocomp variable in nhamcsopd2005 dataset :

who completed the patient record forms? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         hospital staff |      5,156       51.56       51.56
census field rep - abstract after rep p |      3,669       36.69       88.25
                                  other |        329        3.29       91.54
            multiple categories checked |        120        1.20       92.74
                                unknown |        726        7.26      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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