Frequencies for first 10,000 rows of pct012o052 variable in sf12010860us34 dataset :

   49 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,056       70.56       70.56
          1 |      1,498       14.98       85.54
          2 |        616        6.16       91.70
          3 |        353        3.53       95.23
          4 |        190        1.90       97.13
          5 |        115        1.15       98.28
          6 |         61        0.61       98.89
          7 |         36        0.36       99.25
          8 |         20        0.20       99.45
          9 |         18        0.18       99.63
         10 |          8        0.08       99.71
         11 |          5        0.05       99.76
         12 |          3        0.03       99.79
         13 |          2        0.02       99.81
         14 |          3        0.03       99.84
         15 |          5        0.05       99.89
         16 |          1        0.01       99.90
         17 |          3        0.03       99.93
         18 |          2        0.02       99.95
         19 |          1        0.01       99.96
         22 |          1        0.01       99.97
         24 |          1        0.01       99.98
         34 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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