Frequencies for d_4_snf_c11_57 variable in prds_hosp10_yr2010 dataset :

d_4_snf_c11 |
        _57 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          1        0.04        0.04
         17 |          1        0.04        0.09
         21 |          1        0.04        0.13
         40 |          1        0.04        0.17
          . |      2,319       99.83      100.00
------------+-----------------------------------
      Total |      2,323      100.00

by Jean Roth , jroth@nber.org , 24 Aug 2018