Frequencies for sourcename variable in network2014 dataset :

Source Name |      Freq.     Percent        Cum.
------------+-----------------------------------
       HIOS |        494       52.72       52.72
        OPM |         36        3.84       56.56
      SERFF |        407       43.44      100.00
------------+-----------------------------------
      Total |        937      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016