Frequencies for d_4_hos_c6_55 variable in hosp_rollup2552_96_1996 dataset :

d_4_hos_c6_ |
         55 |      Freq.     Percent        Cum.
------------+-----------------------------------
    1659751 |          1        0.02        0.02
    1970530 |          1        0.02        0.03
    2993939 |          1        0.02        0.05
   2.25e+07 |          1        0.02        0.07
          . |      6,017       99.93      100.00
------------+-----------------------------------
      Total |      6,021      100.00

by Jean Roth , jroth@nber.org , 3 Sep 2018