Frequencies for first 10,000 rows of ld_anes variable in natlterr2011 dataset :

 Anesthesia |
        RFP |
616=f_ld_an |
     esth R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,536       25.36       25.36
          N |      5,516       55.16       80.52
          U |      1,092       10.92       91.44
          Y |        856        8.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015