Summary statistics for icd9sg2008 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     prcdrcd |          0
   shortdesc |          0
     version |      3,768          25           0         25         25
       fyear |      3,768        2008           0       2008       2008

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