Frequencies for first 10,000 rows of pastvis variable in nhamcsed2009 dataset :

   how many |
  times has |
    patient |
  been seen |
 in this ed |
 within the |
    last 12 |
    months? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        340        3.40        3.40
         -8 |      3,148       31.48       34.88
          0 |      3,002       30.02       64.90
          1 |      1,680       16.80       81.70
          2 |        773        7.73       89.43
          3 |        383        3.83       93.26
          4 |        210        2.10       95.36
          5 |        124        1.24       96.60
          6 |         63        0.63       97.23
          7 |         54        0.54       97.77
          8 |         40        0.40       98.17
          9 |         27        0.27       98.44
         10 |         29        0.29       98.73
         11 |         26        0.26       98.99
         12 |         22        0.22       99.21
         13 |         11        0.11       99.32
         14 |         11        0.11       99.43
         15 |          6        0.06       99.49
         16 |          3        0.03       99.52
         17 |          5        0.05       99.57
         18 |          3        0.03       99.60
         19 |          7        0.07       99.67
         20 |          2        0.02       99.69
         21 |          1        0.01       99.70
         23 |          1        0.01       99.71
         24 |          2        0.02       99.73
         25 |          2        0.02       99.75
         26 |          1        0.01       99.76
         27 |          1        0.01       99.77
         28 |          1        0.01       99.78
         29 |          1        0.01       99.79
         30 |          1        0.01       99.80
         31 |          1        0.01       99.81
         32 |          1        0.01       99.82
         33 |          3        0.03       99.85
         34 |          2        0.02       99.87
         35 |          2        0.02       99.89
         37 |          1        0.01       99.90
         40 |          2        0.02       99.92
         42 |          1        0.01       99.93
         44 |          1        0.01       99.94
         45 |          1        0.01       99.95
         50 |          1        0.01       99.96
         62 |          1        0.01       99.97
         68 |          1        0.01       99.98
         78 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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