Frequencies for first 10,000 rows of admtphys variable in nhamcsed2015 dataset 

      Admitting |
      physician |      Freq.     Percent        Cum.
----------------+-----------------------------------
          Blank |         17        0.17        0.17
        Unknown |        449        4.49        4.66
 Not applicable |      8,926       89.26       93.92
    Hospitalist |        440        4.40       98.32
Not hospitalist |        168        1.68      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017