Frequencies for first 10,000 rows of pct012n038 variable in sf12000860us29 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,184       91.84       91.84
          1 |        533        5.33       97.17
          2 |        131        1.31       98.48
          3 |         53        0.53       99.01
          4 |         28        0.28       99.29
          5 |         13        0.13       99.42
          6 |         13        0.13       99.55
          7 |          6        0.06       99.61
          8 |          7        0.07       99.68
          9 |          4        0.04       99.72
         10 |          5        0.05       99.77
         11 |          2        0.02       99.79
         12 |          6        0.06       99.85
         13 |          4        0.04       99.89
         14 |          1        0.01       99.90
         15 |          1        0.01       99.91
         17 |          2        0.02       99.93
         18 |          1        0.01       99.94
         21 |          1        0.01       99.95
         22 |          1        0.01       99.96
         24 |          1        0.01       99.97
         32 |          1        0.01       99.98
         35 |          1        0.01       99.99
         47 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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