Frequencies for b_1_c18_49 variable in snf_rollup2540_96_2011 dataset :

 b_1_c18_49 |      Freq.     Percent        Cum.
------------+-----------------------------------
       3756 |          1        0.06        0.06
     160878 |          1        0.06        0.11
     352279 |          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