Frequencies for first 10,000 rows of pct012n040 variable in sf12000860us29 dataset :

   37 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,246       92.46       92.46
          1 |        486        4.86       97.32
          2 |        137        1.37       98.69
          3 |         44        0.44       99.13
          4 |         24        0.24       99.37
          5 |         12        0.12       99.49
          6 |          6        0.06       99.55
          7 |         12        0.12       99.67
          8 |          4        0.04       99.71
          9 |          8        0.08       99.79
         10 |          2        0.02       99.81
         13 |          4        0.04       99.85
         14 |          1        0.01       99.86
         15 |          3        0.03       99.89
         16 |          3        0.03       99.92
         18 |          2        0.02       99.94
         19 |          2        0.02       99.96
         23 |          1        0.01       99.97
         24 |          1        0.01       99.98
         37 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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