Frequencies for first 10,000 rows of clia_id_number_5 variable in pos1994 dataset :

clia - hosp |
  lab id #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,997       99.97       99.97
 01D0687850 |          1        0.01       99.98
 01D0690445 |          1        0.01       99.99
 01D0706597 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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