Frequencies for first 10,000 rows of prov2070 variable in pos2009 dataset :

       SRV: |
 ANESTHESIA |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |        455        4.55       90.93
          1 |        384        3.84       94.77
          2 |        452        4.52       99.29
          3 |         71        0.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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