Frequencies for first 10,000 rows of agrmt_extnsn_dt variable in pos2011 dataset :

        LTC |
  Agreement |
  Extension |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  31 Jul 12 |          1        0.01        0.01
  31 Aug 12 |          1        0.01        0.02
          . |      9,998       99.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019