Frequencies for a7_1_c3_7 variable in prds_hosp10_yr2017 dataset :

  a7_1_c3_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
      -8988 |          1        0.03        0.03
      -2647 |          1        0.03        0.05
    1488923 |          1        0.03        0.08
    9315679 |          1        0.03        0.11
          . |      3,745       99.89      100.00
------------+-----------------------------------
      Total |      3,749      100.00

by Jean Roth , jroth@nber.org , 26 Oct 2018