Frequencies for first 10,000 rows of pastvis variable in nhamcsed2010 dataset :

   How many |
  times has |
    patient |
    been in |
    this ED |
 within the |
    last 12 |
    months? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        175        1.75        1.75
    unknown |      4,165       41.65       43.40
          0 |      2,578       25.78       69.18
          1 |      1,380       13.80       82.98
          2 |        639        6.39       89.37
          3 |        341        3.41       92.78
          4 |        217        2.17       94.95
          5 |        143        1.43       96.38
          6 |         99        0.99       97.37
          7 |         47        0.47       97.84
          8 |         47        0.47       98.31
          9 |         22        0.22       98.53
         10 |         32        0.32       98.85
         11 |         14        0.14       98.99
         12 |         22        0.22       99.21
         13 |         12        0.12       99.33
         14 |          9        0.09       99.42
         15 |          9        0.09       99.51
         16 |          5        0.05       99.56
         17 |          4        0.04       99.60
         18 |          8        0.08       99.68
         19 |          5        0.05       99.73
         20 |          4        0.04       99.77
         21 |          1        0.01       99.78
         22 |          3        0.03       99.81
         24 |          3        0.03       99.84
         25 |          1        0.01       99.85
         26 |          1        0.01       99.86
         27 |          1        0.01       99.87
         28 |          1        0.01       99.88
         33 |          2        0.02       99.90
         34 |          1        0.01       99.91
         35 |          1        0.01       99.92
         36 |          1        0.01       99.93
         44 |          1        0.01       99.94
         50 |          1        0.01       99.95
         58 |          1        0.01       99.96
         74 |          1        0.01       99.97
 99 or more |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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