Frequencies for b_1_c18_51 variable in snf_rollup2540_96_2011 dataset :

 b_1_c18_51 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.06        0.06
        867 |          1        0.06        0.11
        927 |          1        0.06        0.17
       1304 |          1        0.06        0.22
       4255 |          1        0.06        0.28
       9312 |          1        0.06        0.33
      25362 |          1        0.06        0.39
      33620 |          1        0.06        0.44
     206677 |          1        0.06        0.50
          . |      1,800       99.50      100.00
------------+-----------------------------------
      Total |      1,809      100.00

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