Frequencies for d4_snf_c2_67 variable in hosp_rollup2552_96_1997 dataset :

d4_snf_c2_6 |
          7 |      Freq.     Percent        Cum.
------------+-----------------------------------
       1347 |          1        0.02        0.02
       1960 |          1        0.02        0.03
     455645 |          1        0.02        0.05
          . |      6,312       99.95      100.00
------------+-----------------------------------
      Total |      6,315      100.00

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