Frequencies for first 10,000 rows of pct012k025 variable in sf12010860us30 dataset :

   22 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,889       88.89       88.89
          1 |        757        7.57       96.46
          2 |        203        2.03       98.49
          3 |         68        0.68       99.17
          4 |         29        0.29       99.46
          5 |         16        0.16       99.62
          6 |         12        0.12       99.74
          7 |          3        0.03       99.77
          8 |          4        0.04       99.81
          9 |          2        0.02       99.83
         10 |          1        0.01       99.84
         11 |          1        0.01       99.85
         12 |          1        0.01       99.86
         13 |          2        0.02       99.88
         14 |          1        0.01       99.89
         15 |          1        0.01       99.90
         16 |          1        0.01       99.91
         18 |          1        0.01       99.92
         24 |          1        0.01       99.93
         27 |          1        0.01       99.94
         30 |          1        0.01       99.95
         32 |          1        0.01       99.96
         41 |          1        0.01       99.97
         52 |          1        0.01       99.98
         66 |          1        0.01       99.99
         73 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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