Frequencies for first 10,000 rows of explanation_code variable in nadac20170524 dataset :

 Codes that |
 pertain to |
    how the |
  NADAC was |
 calculated |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,345       63.45       63.45
       1, 5 |      1,004       10.04       73.49
    1, 5, 6 |         93        0.93       74.42
       1, 6 |        390        3.90       78.32
          2 |        505        5.05       83.37
       2, 5 |        212        2.12       85.49
    2, 5, 6 |         45        0.45       85.94
       2, 6 |         73        0.73       86.67
          3 |          5        0.05       86.72
       3, 5 |          1        0.01       86.73
       3, 6 |          1        0.01       86.74
          4 |        819        8.19       94.93
       4, 5 |        370        3.70       98.63
    4, 5, 6 |         42        0.42       99.05
       4, 6 |         95        0.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Feb 2018