Summary statistics for icd9sg2006 dataset :

by Jean Roth , jroth@nber.org , 27 Apr 2017

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     prcdrcd |          0
   shortdesc |          0
     version |      3,701          23           0         23         23
       fyear |      3,701        2006           0       2006       2006

by Jean Roth , jroth@nber.org , 27 Apr 2017