Frequencies for first 10,000 rows of pct012n051 variable in sf12010880us33 dataset :

   48 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,323       93.23       93.23
          1 |        462        4.62       97.85
          2 |        102        1.02       98.87
          3 |         39        0.39       99.26
          4 |         14        0.14       99.40
          5 |         11        0.11       99.51
          6 |         10        0.10       99.61
          7 |          7        0.07       99.68
          8 |          6        0.06       99.74
          9 |          6        0.06       99.80
         10 |          4        0.04       99.84
         11 |          1        0.01       99.85
         12 |          5        0.05       99.90
         13 |          3        0.03       99.93
         17 |          2        0.02       99.95
         20 |          1        0.01       99.96
         21 |          1        0.01       99.97
         30 |          1        0.01       99.98
         42 |          1        0.01       99.99
         44 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017