Frequencies for first 10,000 rows of whocomp variable in nhamcsopd2010 dataset :

who completed the patient record forms? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
census field rep - abstract after rep p |      7,032       70.32       70.32
census field rep - abstract during rep  |        206        2.06       72.38
                         hospital staff |      2,199       21.99       94.37
            multiple categories checked |        563        5.63      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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