Frequencies for first 10,000 rows of approximate variable in icd9toicd10pcsgem dataset :

Approximate |
Flag-comple |
 te meaning |
of ICD-9/10 |
  codes are |
        not |
 considered |
  equivalen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          7        0.07        0.07
          1 |      9,993       99.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 May 2016