Frequencies for first 10,000 rows of pct012n021 variable in sf12000860us29 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,066       90.66       90.66
          1 |        632        6.32       96.98
          2 |        148        1.48       98.46
          3 |         58        0.58       99.04
          4 |         23        0.23       99.27
          5 |         16        0.16       99.43
          6 |         14        0.14       99.57
          7 |          7        0.07       99.64
          8 |          8        0.08       99.72
          9 |          3        0.03       99.75
         10 |          2        0.02       99.77
         11 |          3        0.03       99.80
         12 |          3        0.03       99.83
         13 |          1        0.01       99.84
         15 |          1        0.01       99.85
         17 |          2        0.02       99.87
         20 |          1        0.01       99.88
         23 |          1        0.01       99.89
         24 |          1        0.01       99.90
         25 |          1        0.01       99.91
         29 |          1        0.01       99.92
         33 |          1        0.01       99.93
         38 |          1        0.01       99.94
         43 |          1        0.01       99.95
         46 |          1        0.01       99.96
         56 |          1        0.01       99.97
         62 |          1        0.01       99.98
         74 |          1        0.01       99.99
        114 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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