Frequencies for psi_15_acc_lac_f variable in vwhqi_hosp_ahrq dataset :

PSI_15_ACC_ |
      LAC_F |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,316       72.18       72.18
          4 |          3        0.07       72.25
          5 |      1,259       27.41       99.65
          j |         16        0.35      100.00
------------+-----------------------------------
      Total |      4,594      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016