Frequencies for nnochrge variable in namcsphys2005_2010 dataset :

 from those |
      'new' |
  patients, |
  physician |
accepts: no |
     charge |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        200        2.68        2.68
         -8 |        627        8.42       11.10
         -7 |        221        2.97       14.07
          1 |      3,394       45.56       59.63
          2 |      3,007       40.37      100.00
------------+-----------------------------------
      Total |      7,449      100.00

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