Frequencies for first 10,000 rows of tfqhcgf_yr variable in t_103113_1 dataset 

 tfqhcgf_yr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,966       99.66       99.66
          1 |         31        0.31       99.97
          2 |          2        0.02       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 14 Mar 2018