Frequencies for first 10,000 rows of place variable in namcs1999 dataset :

       place of occurrence of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                           Residence |        103        1.03        1.03
              Recreation/sports area |         54        0.54        1.57
                      Street/highway |         84        0.84        2.41
                              School |         14        0.14        2.55
               Other public building |         35        0.35        2.90
                    Industrial place |         97        0.97        3.87
                               Other |         54        0.54        4.41
                             Unknown |        654        6.54       10.95
Not applicable (not an injury visit) |      8,905       89.05      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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