Frequencies for d_4_hos_c2_68 variable in hosp_rollup2552_96_1997 dataset :

d_4_hos_c2_ |
         68 |      Freq.     Percent        Cum.
------------+-----------------------------------
         38 |          1        0.02        0.02
        312 |          1        0.02        0.03
       4231 |          1        0.02        0.05
      17557 |          1        0.02        0.06
          . |      6,311       99.94      100.00
------------+-----------------------------------
      Total |      6,315      100.00

by Jean Roth , jroth@nber.org , 5 Sep 2018