Frequencies for first 10,000 rows of pct012n143 variable in sf12000860us29 dataset :

   36 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,216       92.16       92.16
          1 |        524        5.24       97.40
          2 |        120        1.20       98.60
          3 |         58        0.58       99.18
          4 |         24        0.24       99.42
          5 |         10        0.10       99.52
          6 |         11        0.11       99.63
          7 |          7        0.07       99.70
          8 |          3        0.03       99.73
          9 |          4        0.04       99.77
         10 |          4        0.04       99.81
         11 |          1        0.01       99.82
         12 |          1        0.01       99.83
         13 |          2        0.02       99.85
         14 |          3        0.03       99.88
         15 |          2        0.02       99.90
         16 |          1        0.01       99.91
         17 |          1        0.01       99.92
         19 |          2        0.02       99.94
         21 |          1        0.01       99.95
         31 |          1        0.01       99.96
         34 |          2        0.02       99.98
         44 |          1        0.01       99.99
         49 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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