Frequencies for c_c2_31 variable in snf_rollup2540_96_2011 dataset :

    c_c2_31 |      Freq.     Percent        Cum.
------------+-----------------------------------
       2000 |          1        0.06        0.06
       3401 |          1        0.06        0.11
       3982 |          1        0.06        0.17
          . |      1,806       99.83      100.00
------------+-----------------------------------
      Total |      1,809      100.00

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