Frequencies for first 10,000 rows of patcode variable in namcs2010 dataset :

    patient |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        385        3.85        3.85
          2 |        384        3.84        7.69
          3 |        383        3.83       11.52
          4 |        383        3.83       15.35
          5 |        381        3.81       19.16
          6 |        378        3.78       22.94
          7 |        377        3.77       26.71
          8 |        370        3.70       30.41
          9 |        361        3.61       34.02
         10 |        359        3.59       37.61
         11 |        351        3.51       41.12
         12 |        344        3.44       44.56
         13 |        338        3.38       47.94
         14 |        332        3.32       51.26
         15 |        321        3.21       54.47
         16 |        313        3.13       57.60
         17 |        308        3.08       60.68
         18 |        303        3.03       63.71
         19 |        296        2.96       66.67
         20 |        285        2.85       69.52
         21 |        271        2.71       72.23
         22 |        260        2.60       74.83
         23 |        246        2.46       77.29
         24 |        230        2.30       79.59
         25 |        220        2.20       81.79
         26 |        205        2.05       83.84
         27 |        195        1.95       85.79
         28 |        181        1.81       87.60
         29 |        164        1.64       89.24
         30 |        146        1.46       90.70
         31 |        132        1.32       92.02
         32 |        114        1.14       93.16
         33 |        103        1.03       94.19
         34 |         93        0.93       95.12
         35 |         82        0.82       95.94
         36 |         73        0.73       96.67
         37 |         63        0.63       97.30
         38 |         52        0.52       97.82
         39 |         45        0.45       98.27
         40 |         36        0.36       98.63
         41 |         26        0.26       98.89
         42 |         21        0.21       99.10
         43 |         15        0.15       99.25
         44 |         12        0.12       99.37
         45 |         11        0.11       99.48
         46 |         10        0.10       99.58
         47 |          9        0.09       99.67
         48 |          5        0.05       99.72
         49 |          4        0.04       99.76
         50 |          4        0.04       99.80
         51 |          4        0.04       99.84
         52 |          4        0.04       99.88
         53 |          4        0.04       99.92
         54 |          1        0.01       99.93
         55 |          1        0.01       99.94
         56 |          1        0.01       99.95
         57 |          1        0.01       99.96
         58 |          1        0.01       99.97
         59 |          1        0.01       99.98
         60 |          1        0.01       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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