Frequencies for first 10,000 rows of place variable in namcs1997 dataset :

       place of occurrence of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                           Residence |        128        1.28        1.28
              Recreation/sports area |         49        0.49        1.77
                      Street/highway |         69        0.69        2.46
                              School |         17        0.17        2.63
               Other public building |         18        0.18        2.81
                    Industrial place |        102        1.02        3.83
                             Unknown |        470        4.70        8.53
Not applicable (not an injury visit) |      9,147       91.47      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016