Frequencies for first 10,000 rows of PCT012B097 variable in sf12000860us17 dataset :

   94 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,384       93.84       93.84
          1 |        437        4.37       98.21
          2 |        110        1.10       99.31
          3 |         29        0.29       99.60
          4 |         13        0.13       99.73
          5 |         13        0.13       99.86
          6 |          5        0.05       99.91
          7 |          3        0.03       99.94
          8 |          4        0.04       99.98
          9 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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