Frequencies for first 10,000 rows of prov0615 variable in pos1991 dataset :

   clia lab |
    program |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,536       85.36       85.36
          1 |      1,047       10.47       95.83
          2 |         33        0.33       96.16
          3 |        328        3.28       99.44
          4 |         56        0.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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