Frequencies for first 10,000 rows of pct012o030 variable in sf12000860us30 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,362       73.62       73.62
          1 |      1,153       11.53       85.15
          2 |        476        4.76       89.91
          3 |        258        2.58       92.49
          4 |        193        1.93       94.42
          5 |        118        1.18       95.60
          6 |         89        0.89       96.49
          7 |         63        0.63       97.12
          8 |         45        0.45       97.57
          9 |         34        0.34       97.91
         10 |         26        0.26       98.17
         11 |         20        0.20       98.37
         12 |         25        0.25       98.62
         13 |         20        0.20       98.82
         14 |         13        0.13       98.95
         15 |         18        0.18       99.13
         16 |         14        0.14       99.27
         17 |         11        0.11       99.38
         18 |          8        0.08       99.46
         19 |          3        0.03       99.49
         20 |          4        0.04       99.53
         21 |          5        0.05       99.58
         22 |          5        0.05       99.63
         23 |          3        0.03       99.66
         24 |          3        0.03       99.69
         25 |          4        0.04       99.73
         26 |          4        0.04       99.77
         27 |          3        0.03       99.80
         28 |          2        0.02       99.82
         29 |          3        0.03       99.85
         32 |          1        0.01       99.86
         33 |          3        0.03       99.89
         35 |          1        0.01       99.90
         36 |          1        0.01       99.91
         37 |          2        0.02       99.93
         39 |          1        0.01       99.94
         43 |          1        0.01       99.95
         45 |          1        0.01       99.96
         52 |          1        0.01       99.97
         53 |          2        0.02       99.99
         86 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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