Frequencies for first 10,000 rows of age variable in nhamcsopd2011 dataset :

   Patient age in |
            years |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under one year |        320        3.20        3.20
                1 |        196        1.96        5.16
                2 |        129        1.29        6.45
                3 |        115        1.15        7.60
                4 |        104        1.04        8.64
                5 |        107        1.07        9.71
                6 |         95        0.95       10.66
                7 |         83        0.83       11.49
                8 |        115        1.15       12.64
                9 |         99        0.99       13.63
               10 |         96        0.96       14.59
               11 |        109        1.09       15.68
               12 |        100        1.00       16.68
               13 |        104        1.04       17.72
               14 |         98        0.98       18.70
               15 |         96        0.96       19.66
               16 |        126        1.26       20.92
               17 |        103        1.03       21.95
               18 |         98        0.98       22.93
               19 |        123        1.23       24.16
               20 |         96        0.96       25.12
               21 |        140        1.40       26.52
               22 |        129        1.29       27.81
               23 |        124        1.24       29.05
               24 |        135        1.35       30.40
               25 |        130        1.30       31.70
               26 |        124        1.24       32.94
               27 |        154        1.54       34.48
               28 |        132        1.32       35.80
               29 |        153        1.53       37.33
               30 |        132        1.32       38.65
               31 |        143        1.43       40.08
               32 |        131        1.31       41.39
               33 |        123        1.23       42.62
               34 |        130        1.30       43.92
               35 |        130        1.30       45.22
               36 |        124        1.24       46.46
               37 |        120        1.20       47.66
               38 |        124        1.24       48.90
               39 |        142        1.42       50.32
               40 |        117        1.17       51.49
               41 |        126        1.26       52.75
               42 |        102        1.02       53.77
               43 |        126        1.26       55.03
               44 |        150        1.50       56.53
               45 |        134        1.34       57.87
               46 |        153        1.53       59.40
               47 |        139        1.39       60.79
               48 |        165        1.65       62.44
               49 |        158        1.58       64.02
               50 |        172        1.72       65.74
               51 |        143        1.43       67.17
               52 |        169        1.69       68.86
               53 |        163        1.63       70.49
               54 |        151        1.51       72.00
               55 |        135        1.35       73.35
               56 |        166        1.66       75.01
               57 |        138        1.38       76.39
               58 |        140        1.40       77.79
               59 |        144        1.44       79.23
               60 |        154        1.54       80.77
               61 |        128        1.28       82.05
               62 |        125        1.25       83.30
               63 |        130        1.30       84.60
               64 |        134        1.34       85.94
               65 |        111        1.11       87.05
               66 |        110        1.10       88.15
               67 |         88        0.88       89.03
               68 |         97        0.97       90.00
               69 |         77        0.77       90.77
               70 |         78        0.78       91.55
               71 |         54        0.54       92.09
               72 |         61        0.61       92.70
               73 |         57        0.57       93.27
               74 |         48        0.48       93.75
               75 |         47        0.47       94.22
               76 |         64        0.64       94.86
               77 |         49        0.49       95.35
               78 |         39        0.39       95.74
               79 |         45        0.45       96.19
               80 |         49        0.49       96.68
               81 |         42        0.42       97.10
               82 |         28        0.28       97.38
               83 |         36        0.36       97.74
               84 |         42        0.42       98.16
               85 |         34        0.34       98.50
               86 |         37        0.37       98.87
               87 |         30        0.30       99.17
               88 |         12        0.12       99.29
               89 |         24        0.24       99.53
               90 |         13        0.13       99.66
91 years or older |         34        0.34      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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