Frequencies for first 10,000 rows of a1 variable in miacc dataset :

         a1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,561       45.61       45.61
          1 |         71        0.71       46.32
          2 |         97        0.97       47.29
          3 |        107        1.07       48.36
          4 |         93        0.93       49.29
          5 |        120        1.20       50.49
          6 |        145        1.45       51.94
          7 |        161        1.61       53.55
          8 |        137        1.37       54.92
          9 |        202        2.02       56.94
         10 |        164        1.64       58.58
         11 |        199        1.99       60.57
         12 |        202        2.02       62.59
         13 |        223        2.23       64.82
         14 |        229        2.29       67.11
         15 |        248        2.48       69.59
         16 |        277        2.77       72.36
         17 |        282        2.82       75.18
         18 |        248        2.48       77.66
         19 |        257        2.57       80.23
         20 |        220        2.20       82.43
         21 |        234        2.34       84.77
         22 |        221        2.21       86.98
         23 |        174        1.74       88.72
         24 |        155        1.55       90.27
         25 |        165        1.65       91.92
         26 |        129        1.29       93.21
         27 |        123        1.23       94.44
         28 |         87        0.87       95.31
         29 |         86        0.86       96.17
         30 |         72        0.72       96.89
         31 |         54        0.54       97.43
         32 |         49        0.49       97.92
         33 |         32        0.32       98.24
         34 |         42        0.42       98.66
         35 |         24        0.24       98.90
         36 |         16        0.16       99.06
         37 |         17        0.17       99.23
         38 |          7        0.07       99.30
         39 |         15        0.15       99.45
         40 |         11        0.11       99.56
         41 |          4        0.04       99.60
         42 |          5        0.05       99.65
         43 |          8        0.08       99.73
         44 |          7        0.07       99.80
         45 |          4        0.04       99.84
         46 |          4        0.04       99.88
         47 |          1        0.01       99.89
         48 |          2        0.02       99.91
         49 |          4        0.04       99.95
         50 |          1        0.01       99.96
         51 |          1        0.01       99.97
         57 |          1        0.01       99.98
         58 |          1        0.01       99.99
         59 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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