Frequencies for a_c1_34 variable in snf_rollup2540_96_2011 dataset :

    a_c1_34 |      Freq.     Percent        Cum.
------------+-----------------------------------
      38220 |          1        0.06        0.06
      88670 |          1        0.06        0.11
     589702 |          1        0.06        0.17
     605963 |          1        0.06        0.22
          . |      1,805       99.78      100.00
------------+-----------------------------------
      Total |      1,809      100.00

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