Frequencies for first 10,000 rows of pct012k138 variable in sf12000860us26 dataset :

   31 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,863       88.63       88.63
          1 |        837        8.37       97.00
          2 |        195        1.95       98.95
          3 |         52        0.52       99.47
          4 |         19        0.19       99.66
          5 |          6        0.06       99.72
          6 |          8        0.08       99.80
          7 |          1        0.01       99.81
          8 |          3        0.03       99.84
          9 |          1        0.01       99.85
         10 |          2        0.02       99.87
         11 |          1        0.01       99.88
         12 |          3        0.03       99.91
         15 |          1        0.01       99.92
         19 |          1        0.01       99.93
         24 |          1        0.01       99.94
         30 |          1        0.01       99.95
         32 |          1        0.01       99.96
         46 |          1        0.01       99.97
         47 |          1        0.01       99.98
         54 |          1        0.01       99.99
         60 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017