Frequencies for a_c1_33 variable in snf_rollup2540_96_1995 dataset :

    a_c1_33 |      Freq.     Percent        Cum.
------------+-----------------------------------
       4836 |          1        0.08        0.08
       7258 |          1        0.08        0.16
      17479 |          1        0.08        0.24
      31642 |          1        0.08        0.32
      47979 |          1        0.08        0.40
          . |      1,230       99.60      100.00
------------+-----------------------------------
      Total |      1,235      100.00

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