Frequencies for first 10,000 rows of patcode variable in namcs1996 dataset :

    patient |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,111       11.11       11.11
          2 |        995        9.95       21.06
          3 |        901        9.01       30.07
          4 |        812        8.12       38.19
          5 |        745        7.45       45.64
          6 |        672        6.72       52.36
          7 |        603        6.03       58.39
          8 |        537        5.37       63.76
          9 |        482        4.82       68.58
         10 |        440        4.40       72.98
         11 |        388        3.88       76.86
         12 |        337        3.37       80.23
         13 |        293        2.93       83.16
         14 |        247        2.47       85.63
         15 |        224        2.24       87.87
         16 |        188        1.88       89.75
         17 |        156        1.56       91.31
         18 |        124        1.24       92.55
         19 |        108        1.08       93.63
         20 |         95        0.95       94.58
         21 |         80        0.80       95.38
         22 |         73        0.73       96.11
         23 |         63        0.63       96.74
         24 |         52        0.52       97.26
         25 |         45        0.45       97.71
         26 |         35        0.35       98.06
         27 |         31        0.31       98.37
         28 |         24        0.24       98.61
         29 |         21        0.21       98.82
         30 |         15        0.15       98.97
         31 |         13        0.13       99.10
         32 |         12        0.12       99.22
         33 |         10        0.10       99.32
         34 |         10        0.10       99.42
         35 |          8        0.08       99.50
         36 |          7        0.07       99.57
         37 |          6        0.06       99.63
         38 |          4        0.04       99.67
         39 |          2        0.02       99.69
         40 |          2        0.02       99.71
         41 |          2        0.02       99.73
         42 |          2        0.02       99.75
         43 |          2        0.02       99.77
         44 |          2        0.02       99.79
         45 |          2        0.02       99.81
         46 |          2        0.02       99.83
         47 |          2        0.02       99.85
         48 |          2        0.02       99.87
         49 |          2        0.02       99.89
         50 |          1        0.01       99.90
         51 |          1        0.01       99.91
         52 |          1        0.01       99.92
         53 |          1        0.01       99.93
         54 |          1        0.01       99.94
         55 |          1        0.01       99.95
         56 |          1        0.01       99.96
         57 |          1        0.01       99.97
         58 |          1        0.01       99.98
         59 |          1        0.01       99.99
         60 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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