Summary statistics for icd9sg2012 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     prcdrcd |          0
   shortdesc |          0
     version |      3,877          29           0         29         29
       fyear |      3,877        2012           0       2012       2012

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