Frequencies for first 10,000 rows of pct012n128 variable in sf12000860us29 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,153       91.53       91.53
          1 |        524        5.24       96.77
          2 |        147        1.47       98.24
          3 |         59        0.59       98.83
          4 |         28        0.28       99.11
          5 |         20        0.20       99.31
          6 |         14        0.14       99.45
          7 |         14        0.14       99.59
          8 |          7        0.07       99.66
          9 |          5        0.05       99.71
         10 |          5        0.05       99.76
         11 |          4        0.04       99.80
         12 |          1        0.01       99.81
         14 |          1        0.01       99.82
         15 |          1        0.01       99.83
         16 |          1        0.01       99.84
         18 |          2        0.02       99.86
         19 |          1        0.01       99.87
         21 |          2        0.02       99.89
         23 |          3        0.03       99.92
         29 |          1        0.01       99.93
         30 |          1        0.01       99.94
         33 |          1        0.01       99.95
         54 |          1        0.01       99.96
         72 |          1        0.01       99.97
         77 |          1        0.01       99.98
         88 |          1        0.01       99.99
        120 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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