Frequencies for first 10,000 rows of prov0045 variable in pos1996 dataset :

alcohol/dru |
     g unit |
  effective |
       date |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,904       99.04       99.04
   19840101 |          8        0.08       99.12
   19840201 |          3        0.03       99.15
   19840323 |          1        0.01       99.16
   19840401 |          3        0.03       99.19
   19840501 |          2        0.02       99.21
   19840601 |         14        0.14       99.35
   19840701 |         28        0.28       99.63
   19840801 |          2        0.02       99.65
   19840901 |          2        0.02       99.67
   19841001 |          8        0.08       99.75
   19850101 |          9        0.09       99.84
   19850331 |          1        0.01       99.85
   19850501 |          1        0.01       99.86
   19850701 |         11        0.11       99.97
   19850927 |          1        0.01       99.98
   19851201 |          1        0.01       99.99
   19851210 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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