Frequencies for first 10,000 rows of pct012n024 variable in sf12010860us33 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,875       88.75       88.75
          1 |        689        6.89       95.64
          2 |        224        2.24       97.88
          3 |         72        0.72       98.60
          4 |         46        0.46       99.06
          5 |         27        0.27       99.33
          6 |         23        0.23       99.56
          7 |          7        0.07       99.63
          8 |          4        0.04       99.67
          9 |          3        0.03       99.70
         10 |          5        0.05       99.75
         11 |          3        0.03       99.78
         12 |          2        0.02       99.80
         13 |          2        0.02       99.82
         14 |          4        0.04       99.86
         15 |          1        0.01       99.87
         16 |          3        0.03       99.90
         17 |          1        0.01       99.91
         18 |          2        0.02       99.93
         22 |          1        0.01       99.94
         29 |          1        0.01       99.95
         33 |          1        0.01       99.96
         34 |          1        0.01       99.97
         36 |          1        0.01       99.98
         48 |          1        0.01       99.99
         58 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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