Frequencies for first 10,000 rows of prov0625 variable in pos2006 dataset :

        ltc |
  agreement |
ending date |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,928       99.28       99.28
   19870228 |          1        0.01       99.29
   19960930 |          5        0.05       99.34
   19970425 |          1        0.01       99.35
   19970630 |          1        0.01       99.36
   19980731 |          1        0.01       99.37
   20030331 |          1        0.01       99.38
   20040629 |          1        0.01       99.39
   20040731 |          1        0.01       99.40
   20041021 |          1        0.01       99.41
   20041031 |          1        0.01       99.42
   20060531 |          1        0.01       99.43
   20060630 |          1        0.01       99.44
   20060930 |          2        0.02       99.46
   20061130 |          5        0.05       99.51
   20061208 |          1        0.01       99.52
   20061231 |          1        0.01       99.53
   20070228 |          6        0.06       99.59
   20070430 |          4        0.04       99.63
   20070531 |          6        0.06       99.69
   20070630 |          3        0.03       99.72
   20070831 |          4        0.04       99.76
   20070930 |          9        0.09       99.85
   20071031 |          2        0.02       99.87
   20071130 |          2        0.02       99.89
   20071231 |         10        0.10       99.99
   20080131 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016