Frequencies for avg_skin_nat variable in ambulatory_surgical_measures_national 

Avg_Skin_Na |
          t |      Freq.     Percent        Cum.
------------+-----------------------------------
        129 |          1       50.00       50.00
          . |          1       50.00      100.00
------------+-----------------------------------
      Total |          2      100.00

by Jean Roth , jroth@nber.org , 15 Nov 2016