Frequencies for first 10,000 rows of prov0615 variable in pos1995 dataset :

   clia lab |
    program |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,883       88.83       88.83
          1 |        683        6.83       95.66
          2 |         30        0.30       95.96
          3 |        346        3.46       99.42
          4 |         58        0.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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