Frequencies for a7_1_c3_4 variable in prds_hosp10_yr2010 dataset :

  a7_1_c3_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
   -6241650 |          1        0.04        0.04
    -986677 |          1        0.04        0.09
    -557064 |          1        0.04        0.13
      11526 |          1        0.04        0.17
     489722 |          1        0.04        0.22
    1025450 |          1        0.04        0.26
    1893164 |          1        0.04        0.30
          . |      2,316       99.70      100.00
------------+-----------------------------------
      Total |      2,323      100.00

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