Summary statistics for usrace19ages dataset :

by Jean Roth , jroth@nber.org , 2 Jan 2018

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year | 15,837,214    2004.103    7.680168       1990       2016
          st |          0
      stfips |          0
      county |          0
    registry | 15,837,214    85.39787    26.41814          1         99
-------------+---------------------------------------------------------
        race | 15,837,214    2.196461    1.125214          1          4
    hispanic | 15,837,214    .3721997    .4833912          0          1
         sex | 15,837,214    1.501617    .4999974          1          2
         age | 15,837,214    8.247679    5.169903          0         18
         pop | 15,837,214    492.6903    2594.194          1     229303

by Jean Roth , jroth@nber.org , 2 Jan 2018