Frequencies for first 10,000 rows of pct012o154 variable in sf12000860us30 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,396       73.96       73.96
          1 |      1,360       13.60       87.56
          2 |        521        5.21       92.77
          3 |        240        2.40       95.17
          4 |        154        1.54       96.71
          5 |         92        0.92       97.63
          6 |         55        0.55       98.18
          7 |         39        0.39       98.57
          8 |         32        0.32       98.89
          9 |         14        0.14       99.03
         10 |         22        0.22       99.25
         11 |         10        0.10       99.35
         12 |         11        0.11       99.46
         13 |         12        0.12       99.58
         14 |          7        0.07       99.65
         15 |          7        0.07       99.72
         16 |          4        0.04       99.76
         17 |          6        0.06       99.82
         18 |          2        0.02       99.84
         19 |          2        0.02       99.86
         22 |          3        0.03       99.89
         24 |          3        0.03       99.92
         25 |          1        0.01       99.93
         26 |          2        0.02       99.95
         28 |          1        0.01       99.96
         29 |          1        0.01       99.97
         35 |          1        0.01       99.98
         48 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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