Frequencies for first 10,000 rows of prov0615 variable in pos1994 dataset :

   clia lab |
    program |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,797       87.97       87.97
          1 |        758        7.58       95.55
          2 |         30        0.30       95.85
          3 |        357        3.57       99.42
          4 |         58        0.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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