Frequencies for first 10,000 rows of a6 variable in midrvacc dataset :

         a6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,413       64.13       64.13
          1 |         45        0.45       64.58
          2 |         84        0.84       65.42
          3 |         77        0.77       66.19
          4 |         85        0.85       67.04
          5 |         80        0.80       67.84
          6 |         93        0.93       68.77
          7 |        109        1.09       69.86
          8 |        108        1.08       70.94
          9 |        109        1.09       72.03
         10 |        131        1.31       73.34
         11 |        168        1.68       75.02
         12 |        144        1.44       76.46
         13 |        147        1.47       77.93
         14 |        164        1.64       79.57
         15 |        183        1.83       81.40
         16 |        173        1.73       83.13
         17 |        161        1.61       84.74
         18 |        159        1.59       86.33
         19 |        177        1.77       88.10
         20 |        151        1.51       89.61
         21 |        137        1.37       90.98
         22 |        164        1.64       92.62
         23 |        116        1.16       93.78
         24 |        118        1.18       94.96
         25 |         87        0.87       95.83
         26 |         73        0.73       96.56
         27 |         63        0.63       97.19
         28 |         71        0.71       97.90
         29 |         38        0.38       98.28
         30 |         36        0.36       98.64
         31 |         31        0.31       98.95
         32 |         16        0.16       99.11
         33 |         19        0.19       99.30
         34 |         11        0.11       99.41
         35 |          9        0.09       99.50
         36 |         11        0.11       99.61
         37 |          7        0.07       99.68
         38 |          8        0.08       99.76
         39 |          4        0.04       99.80
         40 |          3        0.03       99.83
         42 |          5        0.05       99.88
         43 |          1        0.01       99.89
         44 |          2        0.02       99.91
         45 |          2        0.02       99.93
         47 |          2        0.02       99.95
         49 |          2        0.02       99.97
         51 |          1        0.01       99.98
         63 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016