Frequencies for first 10,000 rows of admtphys variable in nhamcsed2012 dataset :

      Admitting |
      physician |      Freq.     Percent        Cum.
----------------+-----------------------------------
          Blank |         25        0.25        0.25
 Not applicable |      8,884       88.84       89.09
    Hospitalist |        408        4.08       93.17
Not hospitalist |        245        2.45       95.62
        Unknown |        438        4.38      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016