Frequencies for first 10,000 rows of prov0145 variable in pos2001 dataset :

clia - hosp |
  lab id #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,983       99.83       99.83
 01D0305187 |          1        0.01       99.84
 01D0674780 |          1        0.01       99.85
 01D0690066 |          1        0.01       99.86
 01D0690445 |          1        0.01       99.87
 01D0882294 |          1        0.01       99.88
 01D0924325 |          1        0.01       99.89
 03D0526219 |          1        0.01       99.90
 04D0871639 |          1        0.01       99.91
 04D0874017 |          1        0.01       99.92
 04D0913254 |          1        0.01       99.93
 05D0684535 |          1        0.01       99.94
 05D0699147 |          1        0.01       99.95
 05D0875586 |          1        0.01       99.96
 05D0886418 |          1        0.01       99.97
 05D0887243 |          1        0.01       99.98
 05D0931967 |          1        0.01       99.99
 05D0969749 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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