Frequencies for first 10,000 rows of crtfct_type_cd variable in posclia2016 dataset :

       CLIA |
Certificate |
  Type Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        715        7.15        7.15
          2 |      6,968       69.68       76.83
          3 |        610        6.10       82.93
          4 |      1,464       14.64       97.57
          9 |        243        2.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017