Summary statistics for vsoe dataset :

by Jean Roth , jroth@nber.org , 22 Oct 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |    107,161    28.14209    16.34204          1         56
     st_case |    107,161    282072.3      163406      10001     560131
      veh_no |    107,161    1.321134    .9065202          1         40
   veventnum |    107,161    2.319575    1.675811          1         31
         soe |    107,161    33.66619    25.24171          1         99
-------------+---------------------------------------------------------
         aoi |    107,161     32.1521    29.45101          0         99

by Jean Roth , jroth@nber.org , 22 Oct 2016