Frequencies for first 10,000 rows of nrsng_3_srvc_cd variable in pos2006 dataset :

       srv: |
 nursing #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,997       99.97       99.97
          0 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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