Frequencies for first 10,000 rows of admtphys variable in nhamcsed2011 dataset :

      Admitting |
      physician |      Freq.     Percent        Cum.
----------------+-----------------------------------
          Blank |        118        1.18        1.18
 Not applicable |      8,582       85.82       87.00
    Hospitalist |        629        6.29       93.29
Not hospitalist |        430        4.30       97.59
        Unknown |        241        2.41      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016