Frequencies for first 10,000 rows of digsc12d variable in namcs2001 dataset :

   digsc12d |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      8,877       88.77       88.77
         09 |          1        0.01       88.78
         12 |          2        0.02       88.80
         21 |          1        0.01       88.81
         37 |          1        0.01       88.82
         39 |          1        0.01       88.83
         42 |          1        0.01       88.84
         45 |          1        0.01       88.85
         57 |          3        0.03       88.88
         58 |          1        0.01       88.89
         75 |         15        0.15       89.04
         81 |          3        0.03       89.07
         83 |          1        0.01       89.08
         86 |         43        0.43       89.51
         87 |          4        0.04       89.55
         88 |        128        1.28       90.83
         89 |        347        3.47       94.30
         90 |         71        0.71       95.01
         91 |         45        0.45       95.46
         92 |         21        0.21       95.67
         93 |        100        1.00       96.67
         94 |          3        0.03       96.70
         95 |        166        1.66       98.36
         96 |         30        0.30       98.66
         97 |         13        0.13       98.79
         99 |        121        1.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016