Frequencies for first 10,000 rows of amb22d variable in nhamcsopd2001 dataset :

     amb22d |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,929       99.29       99.29
         08 |          2        0.02       99.31
         13 |          3        0.03       99.34
         22 |          3        0.03       99.37
         23 |          1        0.01       99.38
         28 |          2        0.02       99.40
         33 |          2        0.02       99.42
         45 |          5        0.05       99.47
         46 |          1        0.01       99.48
         49 |          4        0.04       99.52
         50 |          1        0.01       99.53
         51 |          1        0.01       99.54
         53 |          1        0.01       99.55
         59 |          1        0.01       99.56
         60 |          1        0.01       99.57
         63 |          1        0.01       99.58
         65 |          3        0.03       99.61
         67 |          2        0.02       99.63
         68 |          2        0.02       99.65
         69 |          2        0.02       99.67
         70 |          1        0.01       99.68
         74 |          1        0.01       99.69
         77 |          1        0.01       99.70
         79 |          1        0.01       99.71
         80 |          4        0.04       99.75
         81 |          1        0.01       99.76
         83 |          1        0.01       99.77
         85 |          3        0.03       99.80
         86 |          8        0.08       99.88
         88 |          1        0.01       99.89
         97 |          4        0.04       99.93
         99 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016