Frequencies for first 10,000 rows of wksht_cd variable in snf_alpha2540_10_2012

   wksht_cd |      Freq.     Percent        Cum.
------------+-----------------------------------
    A000000 |      1,911       19.11       19.11
    A6000A0 |         52        0.52       19.63
    A6000B0 |         52        0.52       20.15
    A6000C0 |         36        0.36       20.51
    A6000D0 |         34        0.34       20.85
    A6000E0 |          2        0.02       20.87
    A800000 |        716        7.16       28.03
    A810001 |        238        2.38       30.41
    A810002 |        397        3.97       34.38
    B10000* |      3,116       31.16       65.54
    B100000 |         40        0.40       65.94
    E00A181 |          3        0.03       65.97
    E10A180 |         76        0.76       66.73
    G000000 |          2        0.02       66.75
    G100000 |         33        0.33       67.08
    G200002 |          1        0.01       67.09
    G300000 |         55        0.55       67.64
    S000001 |        392        3.92       71.56
    S200001 |      1,627       16.27       87.83
    S200002 |      1,004       10.04       97.87
    S300004 |         16        0.16       98.03
    S700000 |        197        1.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2018