Frequencies for first 10,000 rows of a4 variable in miacc dataset :

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,100       41.00       41.00
          1 |         51        0.51       41.51
          2 |         69        0.69       42.20
          3 |         78        0.78       42.98
          4 |         93        0.93       43.91
          5 |        115        1.15       45.06
          6 |        123        1.23       46.29
          7 |        153        1.53       47.82
          8 |        157        1.57       49.39
          9 |        183        1.83       51.22
         10 |        211        2.11       53.33
         11 |        244        2.44       55.77
         12 |        231        2.31       58.08
         13 |        220        2.20       60.28
         14 |        273        2.73       63.01
         15 |        246        2.46       65.47
         16 |        326        3.26       68.73
         17 |        306        3.06       71.79
         18 |        287        2.87       74.66
         19 |        283        2.83       77.49
         20 |        257        2.57       80.06
         21 |        228        2.28       82.34
         22 |        247        2.47       84.81
         23 |        229        2.29       87.10
         24 |        187        1.87       88.97
         25 |        179        1.79       90.76
         26 |        159        1.59       92.35
         27 |        119        1.19       93.54
         28 |        106        1.06       94.60
         29 |         87        0.87       95.47
         30 |         78        0.78       96.25
         31 |         59        0.59       96.84
         32 |         61        0.61       97.45
         33 |         52        0.52       97.97
         34 |         34        0.34       98.31
         35 |         33        0.33       98.64
         36 |         23        0.23       98.87
         37 |         22        0.22       99.09
         38 |         20        0.20       99.29
         39 |         14        0.14       99.43
         40 |          8        0.08       99.51
         41 |          9        0.09       99.60
         42 |         11        0.11       99.71
         43 |          6        0.06       99.77
         44 |          5        0.05       99.82
         45 |          3        0.03       99.85
         46 |          5        0.05       99.90
         47 |          3        0.03       99.93
         48 |          3        0.03       99.96
         49 |          1        0.01       99.97
         50 |          1        0.01       99.98
         55 |          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