Frequencies for s2_1_c2_16 variable in prds_hosp10_yr2015 dataset :

 s2_1_c2_16 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,255       99.95       99.95
     061821 |          1        0.02       99.97
     151804 |          1        0.02       99.98
     301822 |          1        0.02      100.00
------------+-----------------------------------
      Total |      6,258      100.00

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