Frequencies for first 10,000 rows of prov0620 variable in pos2004 dataset :

        ltc |
  agreement |
  beginning |
       date |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,928       99.28       99.28
   19860301 |          1        0.01       99.29
   19951001 |          5        0.05       99.34
   19960425 |          1        0.01       99.35
   19960701 |          1        0.01       99.36
   19970801 |          1        0.01       99.37
   20020401 |          1        0.01       99.38
   20030301 |          1        0.01       99.39
   20030701 |          1        0.01       99.40
   20030801 |          2        0.02       99.42
   20031101 |          2        0.02       99.44
   20040101 |          1        0.01       99.45
   20040301 |          1        0.01       99.46
   20040401 |          1        0.01       99.47
   20040501 |          3        0.03       99.50
   20040601 |          6        0.06       99.56
   20040701 |          3        0.03       99.59
   20040801 |          1        0.01       99.60
   20040901 |          3        0.03       99.63
   20041001 |         14        0.14       99.77
   20041101 |          7        0.07       99.84
   20041124 |          1        0.01       99.85
   20041201 |          2        0.02       99.87
   20050101 |          6        0.06       99.93
   20050201 |          1        0.01       99.94
   20050301 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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