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

   hospital |
   sampling |
 unit (=001 |
 for namcs) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,335       13.35       13.35
          2 |        851        8.51       21.86
          3 |        514        5.14       27.00
          4 |        674        6.74       33.74
          5 |        396        3.96       37.70
          6 |        388        3.88       41.58
          7 |        401        4.01       45.59
          8 |        398        3.98       49.57
          9 |        121        1.21       50.78
         10 |        126        1.26       52.04
         11 |        235        2.35       54.39
         12 |         29        0.29       54.68
         13 |        164        1.64       56.32
         14 |         80        0.80       57.12
         15 |        205        2.05       59.17
         16 |        222        2.22       61.39
         17 |         83        0.83       62.22
         18 |        104        1.04       63.26
         19 |        156        1.56       64.82
         20 |        127        1.27       66.09
         21 |        144        1.44       67.53
         22 |        286        2.86       70.39
         23 |        226        2.26       72.65
         24 |         57        0.57       73.22
         25 |        140        1.40       74.62
         26 |        159        1.59       76.21
         27 |         72        0.72       76.93
         28 |         47        0.47       77.40
         29 |         20        0.20       77.60
         30 |         60        0.60       78.20
         31 |         49        0.49       78.69
         32 |         34        0.34       79.03
         34 |         31        0.31       79.34
         35 |         37        0.37       79.71
         36 |         23        0.23       79.94
         37 |         88        0.88       80.82
         38 |         51        0.51       81.33
         39 |         38        0.38       81.71
         40 |        134        1.34       83.05
         41 |         28        0.28       83.33
         42 |         69        0.69       84.02
         43 |         68        0.68       84.70
         44 |         71        0.71       85.41
         45 |         97        0.97       86.38
         46 |         72        0.72       87.10
         47 |         43        0.43       87.53
         49 |         28        0.28       87.81
         50 |         97        0.97       88.78
         53 |        125        1.25       90.03
         55 |         44        0.44       90.47
         56 |         29        0.29       90.76
         57 |         53        0.53       91.29
         58 |         42        0.42       91.71
         59 |         37        0.37       92.08
         60 |         30        0.30       92.38
         61 |         28        0.28       92.66
         62 |         52        0.52       93.18
         64 |         33        0.33       93.51
         65 |         65        0.65       94.16
         66 |         37        0.37       94.53
         68 |         26        0.26       94.79
         70 |         38        0.38       95.17
         71 |         34        0.34       95.51
         72 |          1        0.01       95.52
         75 |         22        0.22       95.74
         80 |         23        0.23       95.97
         86 |         25        0.25       96.22
         90 |         59        0.59       96.81
         92 |         47        0.47       97.28
         95 |         23        0.23       97.51
        103 |         39        0.39       97.90
        106 |         22        0.22       98.12
        119 |         43        0.43       98.55
        126 |         27        0.27       98.82
        130 |         32        0.32       99.14
        136 |         24        0.24       99.38
        141 |         35        0.35       99.73
        146 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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