Frequencies for first 10,000 rows of place variable in nhamcsopd1996 dataset :

       place of occurrence of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
Not applicable (not an injury visit) |      9,041       90.41       90.41
                                Home |        119        1.19       91.60
                              School |         16        0.16       91.76
               Sports/Athletics Area |         30        0.30       92.06
                      Street/highway |         95        0.95       93.01
                         Other place |         82        0.82       93.83
                       Unknown place |        617        6.17      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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