Frequencies for first 10,000 rows of place variable in nhamcsed1999 dataset :

       place of occurrence of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                           Residence |      1,000       10.00       10.00
              Recreation/sports area |        170        1.70       11.70
                      Street/highway |        533        5.33       17.03
                              School |         51        0.51       17.54
               Other public building |        108        1.08       18.62
                    Industrial place |        167        1.67       20.29
                               Other |        106        1.06       21.35
                             Unknown |      1,324       13.24       34.59
Not applicable (not an injury visit) |      6,541       65.41      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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