Frequencies for a_c1_40 variable in snf_rollup2540_96_2011 dataset :

    a_c1_40 |      Freq.     Percent        Cum.
------------+-----------------------------------
      30170 |          1        0.06        0.06
      58439 |          1        0.06        0.11
      80112 |          1        0.06        0.17
      86717 |          1        0.06        0.22
     101716 |          1        0.06        0.28
     245313 |          1        0.06        0.33
          . |      1,803       99.67      100.00
------------+-----------------------------------
      Total |      1,809      100.00

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