Frequencies for first 10,000 rows of pct013c033 variable in sf12010880us35 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,910       89.10       89.10
          1 |        678        6.78       95.88
          2 |        205        2.05       97.93
          3 |         93        0.93       98.86
          4 |         38        0.38       99.24
          5 |         24        0.24       99.48
          6 |         15        0.15       99.63
          7 |         10        0.10       99.73
          8 |          7        0.07       99.80
          9 |          5        0.05       99.85
         10 |          3        0.03       99.88
         11 |          4        0.04       99.92
         12 |          2        0.02       99.94
         14 |          1        0.01       99.95
         16 |          1        0.01       99.96
         17 |          2        0.02       99.98
         23 |          1        0.01       99.99
         25 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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