Summary statistics for usint dataset :

by Jean Roth , jroth@nber.org , 18 Oct 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     dateest |          0
      agestr |          0
         pop |     12,342     5203549    2.59e+07      18678   2.81e+08
     popmale |     12,342     2544451    1.27e+07       3578   1.38e+08
   popfemale |     12,342     2659098    1.33e+07      15079   1.43e+08
-------------+---------------------------------------------------------
         age |     12,221          50    29.15595          0        100
        year |      1,020      1994.5     2.87369       1990       1999
     yearest |     12,342    1994.793    2.931616       1990       2000
    monthest |     12,342    6.479339     3.44534          1         12

by Jean Roth , jroth@nber.org , 18 Oct 2016