Frequencies for first 10,000 rows of prov2265 variable in pos1999 dataset :

       srv: |
 obstetrics |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,885       88.85       88.85
          0 |        535        5.35       94.20
          1 |        543        5.43       99.63
          2 |         28        0.28       99.91
          3 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016