Frequencies for first 10,000 rows of wksht_cd variable in snf_alpha2540_96_2006

   wksht_cd |      Freq.     Percent        Cum.
------------+-----------------------------------
    A000000 |      3,877       38.77       38.77
    A81000A |         98        0.98       39.75
    A81000B |        318        3.18       42.93
    A81000C |        616        6.16       49.09
    B100000 |      1,313       13.13       62.22
    E10A180 |         70        0.70       62.92
    S000000 |        110        1.10       64.02
    S200000 |      3,598       35.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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