Frequencies for first 10,000 rows of nrsng_3_srvc_cd variable in pos2005 dataset :

       srv: |
 nursing #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,995       99.95       99.95
          0 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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