Frequencies for first 10,000 rows of pct012n025 variable in sf12000860us29 dataset :

   22 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,192       91.92       91.92
          1 |        515        5.15       97.07
          2 |        135        1.35       98.42
          3 |         52        0.52       98.94
          4 |         25        0.25       99.19
          5 |         32        0.32       99.51
          6 |          8        0.08       99.59
          7 |          6        0.06       99.65
          8 |          4        0.04       99.69
          9 |          2        0.02       99.71
         10 |          2        0.02       99.73
         11 |          3        0.03       99.76
         12 |          1        0.01       99.77
         13 |          2        0.02       99.79
         14 |          3        0.03       99.82
         15 |          2        0.02       99.84
         16 |          1        0.01       99.85
         17 |          2        0.02       99.87
         19 |          1        0.01       99.88
         22 |          2        0.02       99.90
         24 |          1        0.01       99.91
         30 |          2        0.02       99.93
         33 |          2        0.02       99.95
         34 |          1        0.01       99.96
         36 |          1        0.01       99.97
         47 |          1        0.01       99.98
         59 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017