Frequencies for first 10,000 rows of amb12d variable in nhamcsopd1992 dataset :

     amb12d |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,356       93.56       93.56
         03 |          5        0.05       93.61
         04 |          3        0.03       93.64
         06 |          2        0.02       93.66
         08 |         11        0.11       93.77
         09 |          2        0.02       93.79
         10 |          1        0.01       93.80
         11 |          2        0.02       93.82
         12 |         15        0.15       93.97
         13 |         55        0.55       94.52
         14 |          1        0.01       94.53
         16 |         23        0.23       94.76
         18 |          3        0.03       94.79
         20 |         12        0.12       94.91
         21 |          6        0.06       94.97
         22 |          6        0.06       95.03
         25 |          1        0.01       95.04
         27 |          1        0.01       95.05
         28 |          7        0.07       95.12
         29 |          2        0.02       95.14
         30 |          2        0.02       95.16
         31 |          6        0.06       95.22
         33 |          3        0.03       95.25
         34 |          3        0.03       95.28
         37 |          1        0.01       95.29
         38 |          6        0.06       95.35
         39 |          2        0.02       95.37
         41 |          4        0.04       95.41
         43 |          1        0.01       95.42
         44 |         21        0.21       95.63
         45 |         52        0.52       96.15
         48 |          3        0.03       96.18
         49 |          2        0.02       96.20
         50 |          2        0.02       96.22
         51 |          3        0.03       96.25
         53 |          9        0.09       96.34
         54 |         16        0.16       96.50
         57 |         12        0.12       96.62
         58 |          1        0.01       96.63
         60 |          2        0.02       96.65
         63 |          5        0.05       96.70
         64 |          2        0.02       96.72
         65 |          1        0.01       96.73
         66 |          9        0.09       96.82
         67 |         17        0.17       96.99
         68 |         24        0.24       97.23
         69 |         25        0.25       97.48
         70 |         31        0.31       97.79
         71 |          6        0.06       97.85
         73 |          1        0.01       97.86
         75 |          1        0.01       97.87
         77 |          2        0.02       97.89
         78 |          6        0.06       97.95
         79 |          1        0.01       97.96
         80 |         14        0.14       98.10
         81 |          8        0.08       98.18
         82 |          6        0.06       98.24
         83 |          3        0.03       98.27
         85 |         17        0.17       98.44
         86 |         89        0.89       99.33
         93 |         18        0.18       99.51
         96 |         14        0.14       99.65
         97 |         23        0.23       99.88
         99 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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