Frequencies for a_c6_50 variable in snf_rollup2540_96_1997 dataset :

    a_c6_50 |      Freq.     Percent        Cum.
------------+-----------------------------------
    -513157 |          1        0.01        0.01
     -94307 |          1        0.01        0.02
     -74830 |          1        0.01        0.03
      -1542 |          1        0.01        0.03
          . |     11,914       99.97      100.00
------------+-----------------------------------
      Total |     11,918      100.00

by Jean Roth , jroth@nber.org , 17 Feb 2018