Frequencies for s3_1_c13_18 variable in prds_hosp10_yr2011 dataset :

s3_1_c13_18 |      Freq.     Percent        Cum.
------------+-----------------------------------
         18 |          1        0.02        0.02
        131 |          1        0.02        0.03
        210 |          1        0.02        0.05
        617 |          1        0.02        0.07
          . |      6,146       99.93      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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