Frequencies for e3_4_hos_c1_20 variable in prds_hosp10_yr2010 dataset :

e3_4_hos_c1 |
        _20 |      Freq.     Percent        Cum.
------------+-----------------------------------
   -3357242 |          1        0.04        0.04
   -1688139 |          1        0.04        0.09
   -1154509 |          1        0.04        0.13
   -1123996 |          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