Frequencies for first 10,000 rows of pct012a099 variable in sf12010880us20 dataset :

   96 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,603       76.03       76.03
          1 |      1,167       11.67       87.70
          2 |        530        5.30       93.00
          3 |        273        2.73       95.73
          4 |        169        1.69       97.42
          5 |        114        1.14       98.56
          6 |         54        0.54       99.10
          7 |         32        0.32       99.42
          8 |         20        0.20       99.62
          9 |         13        0.13       99.75
         10 |          9        0.09       99.84
         11 |          7        0.07       99.91
         12 |          2        0.02       99.93
         13 |          2        0.02       99.95
         14 |          3        0.03       99.98
         16 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017