Frequencies for first 10,000 rows of pct012m144 variable in sf12010880us32 dataset :

   37 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,851       98.51       98.51
          1 |        134        1.34       99.85
          2 |         12        0.12       99.97
          3 |          2        0.02       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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