Frequencies for first 10,000 rows of limitunit variable in bencs2014 dataset :

                     Limit Unit |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      8,588       85.88       85.88
                  Days per Year |        120        1.20       87.08
           Dollars per Lifetime |          8        0.08       87.16
               Dollars per Year |         45        0.45       87.61
               Exam(s) per Year |         50        0.50       88.11
                 Hours per Year |          3        0.03       88.14
               Item(s) per Year |        124        1.24       89.38
       Procedure(s) per 2 Years |          1        0.01       89.39
       Procedure(s) per 3 Years |          4        0.04       89.43
      Procedure(s) per 6 Months |          1        0.01       89.44
      Procedure(s) per Lifetime |          2        0.02       89.46
          Procedure(s) per Year |          1        0.01       89.47
Treatment(s) per Benefit Period |        133        1.33       90.80
      Treatment(s) per Lifetime |         49        0.49       91.29
          Visit(s) per 6 Months |        114        1.14       92.43
              Visit(s) per Year |        757        7.57      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016