Frequencies for first 10,000 rows of a2 variable in miacc dataset :

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,901       59.01       59.01
          1 |         60        0.60       59.61
          2 |         90        0.90       60.51
          3 |         78        0.78       61.29
          4 |         90        0.90       62.19
          5 |         97        0.97       63.16
          6 |         96        0.96       64.12
          7 |        103        1.03       65.15
          8 |        131        1.31       66.46
          9 |        130        1.30       67.76
         10 |        150        1.50       69.26
         11 |        152        1.52       70.78
         12 |        137        1.37       72.15
         13 |        161        1.61       73.76
         14 |        161        1.61       75.37
         15 |        172        1.72       77.09
         16 |        172        1.72       78.81
         17 |        196        1.96       80.77
         18 |        187        1.87       82.64
         19 |        177        1.77       84.41
         20 |        203        2.03       86.44
         21 |        168        1.68       88.12
         22 |        162        1.62       89.74
         23 |        155        1.55       91.29
         24 |        129        1.29       92.58
         25 |        129        1.29       93.87
         26 |        103        1.03       94.90
         27 |         92        0.92       95.82
         28 |         72        0.72       96.54
         29 |         66        0.66       97.20
         30 |         58        0.58       97.78
         31 |         37        0.37       98.15
         32 |         30        0.30       98.45
         33 |         18        0.18       98.63
         34 |         18        0.18       98.81
         35 |         27        0.27       99.08
         36 |         12        0.12       99.20
         37 |         18        0.18       99.38
         38 |          6        0.06       99.44
         39 |          6        0.06       99.50
         40 |          9        0.09       99.59
         41 |          5        0.05       99.64
         42 |          4        0.04       99.68
         43 |          5        0.05       99.73
         44 |          5        0.05       99.78
         45 |          3        0.03       99.81
         46 |          6        0.06       99.87
         47 |          2        0.02       99.89
         48 |          2        0.02       99.91
         49 |          1        0.01       99.92
         50 |          2        0.02       99.94
         51 |          1        0.01       99.95
         54 |          2        0.02       99.97
         60 |          2        0.02       99.99
         72 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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