Frequencies for first 10,000 rows of prov1635 variable in pos2005 dataset :

  prior ltc |
  extension |
       date |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,994       99.94       99.94
   19951201 |          3        0.03       99.97
   19960930 |          1        0.01       99.98
   20040731 |          1        0.01       99.99
   20051231 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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