Frequencies for first 10,000 rows of prov0500 variable in posclia2001 dataset :

   prov0500 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,926       99.26       99.26
   19960221 |          2        0.02       99.28
   19960222 |          3        0.03       99.31
   19960223 |          1        0.01       99.32
   19960418 |          1        0.01       99.33
   19960605 |          1        0.01       99.34
   19960613 |          1        0.01       99.35
   19960618 |          2        0.02       99.37
   19960619 |          2        0.02       99.39
   19960620 |          1        0.01       99.40
   19960627 |          1        0.01       99.41
   19960808 |          1        0.01       99.42
   19960809 |          1        0.01       99.43
   19960911 |          2        0.02       99.45
   19961101 |          1        0.01       99.46
   19970122 |          1        0.01       99.47
   19970430 |          1        0.01       99.48
   19970710 |          1        0.01       99.49
   19970715 |          1        0.01       99.50
   19970716 |          2        0.02       99.52
   19970717 |          1        0.01       99.53
   19970724 |          1        0.01       99.54
   19970923 |          1        0.01       99.55
   19970924 |          1        0.01       99.56
   19970925 |          1        0.01       99.57
   19971021 |          1        0.01       99.58
   19971022 |          1        0.01       99.59
   19971023 |          1        0.01       99.60
   19980309 |          2        0.02       99.62
   19980310 |          1        0.01       99.63
   19980311 |          1        0.01       99.64
   19980520 |          2        0.02       99.66
   19980521 |          1        0.01       99.67
   19980715 |          1        0.01       99.68
   19980716 |          1        0.01       99.69
   19990510 |          2        0.02       99.71
   19990512 |          1        0.01       99.72
   19990623 |          1        0.01       99.73
   19990701 |          1        0.01       99.74
   19990823 |          1        0.01       99.75
   19990824 |          3        0.03       99.78
   19990825 |          1        0.01       99.79
   19990826 |          1        0.01       99.80
   20000119 |          1        0.01       99.81
   20000321 |          1        0.01       99.82
   20000322 |          1        0.01       99.83
   20000417 |          1        0.01       99.84
   20000418 |          1        0.01       99.85
   20000419 |          1        0.01       99.86
   20000711 |          1        0.01       99.87
   20000713 |          1        0.01       99.88
   20001023 |          1        0.01       99.89
   20001025 |          1        0.01       99.90
   20010410 |          1        0.01       99.91
   20010618 |          1        0.01       99.92
   20010620 |          2        0.02       99.94
   20010718 |          1        0.01       99.95
   20010719 |          1        0.01       99.96
   20010821 |          2        0.02       99.98
   20010822 |          1        0.01       99.99
   20010823 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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