Frequencies for first 10,000 rows of a7 variable in midrvacc dataset :

         a7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,688       66.88       66.88
          1 |         58        0.58       67.46
          2 |         73        0.73       68.19
          3 |         51        0.51       68.70
          4 |         63        0.63       69.33
          5 |         71        0.71       70.04
          6 |         69        0.69       70.73
          7 |         88        0.88       71.61
          8 |         91        0.91       72.52
          9 |         90        0.90       73.42
         10 |        117        1.17       74.59
         11 |        137        1.37       75.96
         12 |        138        1.38       77.34
         13 |        143        1.43       78.77
         14 |        159        1.59       80.36
         15 |        163        1.63       81.99
         16 |        160        1.60       83.59
         17 |        156        1.56       85.15
         18 |        170        1.70       86.85
         19 |        153        1.53       88.38
         20 |        159        1.59       89.97
         21 |        147        1.47       91.44
         22 |        130        1.30       92.74
         23 |        113        1.13       93.87
         24 |        104        1.04       94.91
         25 |        101        1.01       95.92
         26 |         87        0.87       96.79
         27 |         61        0.61       97.40
         28 |         46        0.46       97.86
         29 |         36        0.36       98.22
         30 |         41        0.41       98.63
         31 |         26        0.26       98.89
         32 |         16        0.16       99.05
         33 |         18        0.18       99.23
         34 |         11        0.11       99.34
         35 |         14        0.14       99.48
         36 |         14        0.14       99.62
         37 |          6        0.06       99.68
         38 |          4        0.04       99.72
         39 |          3        0.03       99.75
         40 |          3        0.03       99.78
         41 |          2        0.02       99.80
         42 |          2        0.02       99.82
         43 |          2        0.02       99.84
         44 |          4        0.04       99.88
         48 |          3        0.03       99.91
         50 |          3        0.03       99.94
         59 |          1        0.01       99.95
         67 |          1        0.01       99.96
         68 |          1        0.01       99.97
         79 |          1        0.01       99.98
         94 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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