Frequencies for first 10,000 rows of mddo variable in namcs2015 dataset :

    Type of |
 doctor (MD |
     or DO) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,380       93.80       93.80
          2 |        620        6.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017