Summary statistics for per_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     29,757        2011           0       2011       2011
       state |     29,757    27.92976    16.25077          1         56
     st_case |     29,757    279892.1    162466.2      10001     560121
      county |     29,757    90.81675    95.47845          0        999
      fatals |     29,757     1.08771    .3560906          1         15
-------------+---------------------------------------------------------
    a_crainj |     29,757           1           0          1          1
    a_region |     29,757    5.251302    2.350238          1         10
        a_ru |     29,757    1.464765    .5071841          1          3
     a_inter |     29,757    1.885607    .3457248          1          3
     a_relrd |     29,757    2.217831    1.434341          1          6
-------------+---------------------------------------------------------
    a_intsec |     29,757    1.774339     .422343          1          3
    a_roadfc |     29,757    3.921733    1.610211          1          7
      a_junc |     29,757    1.850086    .5349787          1          4
    a_mancol |     29,757    1.910676     1.33264          1          7
       a_tod |     29,757    1.518433    .5135985          1          3
-------------+---------------------------------------------------------
       a_dow |     29,757    1.418423    .4973117          1          3
        a_ct |     29,757    1.454683    .6054081          1          3
        a_lt |     29,757    1.887724    .3157111          1          2
        a_mc |     29,757    1.846994    .3599993          1          2
     a_spcra |     29,757    1.699667    .4584103          1          2
-------------+---------------------------------------------------------
       a_ped |     29,757    1.851766    .3553378          1          2
     a_pedal |     29,757    1.977081    .1496478          1          2
      a_roll |     29,757      1.7366     .440485          1          2
    a_polpur |     29,757    1.990725    .0958614          1          2
    a_posbac |     29,757    2.241725    .8360789          1          3
-------------+---------------------------------------------------------
    a_d15_19 |     29,757    1.894546    .3071429          1          2
    a_d16_19 |     29,757     1.89626    .3049285          1          2
    a_d15_20 |     29,757    1.858487    .3485557          1          2
    a_d16_20 |     29,757    1.860167    .3468191          1          2
    a_d65pls |     29,757    1.824814    .3801322          1          2
-------------+---------------------------------------------------------
    a_d21_24 |     29,757    1.854925    .3521825          1          2
    a_d16_24 |     29,757    1.722687    .4476798          1          2
        a_rd |     29,757    1.506973    .4999598          1          2
        a_hr |     29,757    1.953154    .2113127          1          2
      a_dist |     29,757    1.898511    .3019798          1          2
-------------+---------------------------------------------------------
    a_drowsy |     29,757    1.976241    .1523004          1          2

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