Frequencies for first 10,000 rows of place variable in nhamcsed1998 dataset :

       place of occurrence of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                           Residence |        884        8.84        8.84
              Recreation/sports area |        219        2.19       11.03
                      Street/highway |        556        5.56       16.59
                              School |         64        0.64       17.23
               Other public building |         86        0.86       18.09
                    Industrial place |        178        1.78       19.87
                               Other |        127        1.27       21.14
                             Unknown |      1,281       12.81       33.95
Not applicable (not an injury visit) |      6,605       66.05      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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