Frequencies for first 10,000 rows of ld_anes variable in natlterr2007 dataset :

 Anesthesia |
        RFP |
616=f_ld_an |
     esth R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,163       61.63       61.63
          N |      3,351       33.51       95.14
          U |          1        0.01       95.15
          Y |        485        4.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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