Frequencies for first 10,000 rows of clia_id_number_3 variable in pos1991 dataset :

clia - hosp |
  lab id #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017