Frequencies for first 10,000 rows of pct012k120 variable in sf12010860us30 dataset :

   13 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,917       89.17       89.17
          1 |        782        7.82       96.99
          2 |        181        1.81       98.80
          3 |         54        0.54       99.34
          4 |         31        0.31       99.65
          5 |          5        0.05       99.70
          6 |          4        0.04       99.74
          7 |          6        0.06       99.80
          9 |          2        0.02       99.82
         10 |          1        0.01       99.83
         11 |          2        0.02       99.85
         12 |          1        0.01       99.86
         13 |          2        0.02       99.88
         15 |          1        0.01       99.89
         17 |          1        0.01       99.90
         22 |          1        0.01       99.91
         23 |          1        0.01       99.92
         26 |          1        0.01       99.93
         34 |          1        0.01       99.94
         41 |          1        0.01       99.95
         48 |          2        0.02       99.97
         74 |          1        0.01       99.98
         84 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017