Frequencies for first 10,000 rows of pastvis variable in nhamcsed2007 dataset :

  number of |
 times seen |
 in this ed |
 in last 12 |
     months |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        545        5.45        5.45
    unknown |      3,780       37.80       43.25
          0 |      2,758       27.58       70.83
          1 |      1,456       14.56       85.39
          2 |        563        5.63       91.02
          3 |        317        3.17       94.19
          4 |        183        1.83       96.02
          5 |        110        1.10       97.12
          6 |         76        0.76       97.88
          7 |         42        0.42       98.30
          8 |         33        0.33       98.63
          9 |         25        0.25       98.88
         10 |         23        0.23       99.11
         11 |         11        0.11       99.22
         12 |         13        0.13       99.35
         13 |         10        0.10       99.45
         14 |          7        0.07       99.52
         15 |          5        0.05       99.57
         16 |          2        0.02       99.59
         17 |          7        0.07       99.66
         18 |          2        0.02       99.68
         19 |          4        0.04       99.72
         20 |          4        0.04       99.76
         21 |          3        0.03       99.79
         22 |          1        0.01       99.80
         23 |          1        0.01       99.81
         24 |          2        0.02       99.83
         25 |          4        0.04       99.87
         26 |          1        0.01       99.88
         29 |          1        0.01       99.89
         31 |          1        0.01       99.90
         33 |          1        0.01       99.91
         38 |          1        0.01       99.92
         39 |          2        0.02       99.94
         51 |          1        0.01       99.95
         52 |          1        0.01       99.96
         56 |          1        0.01       99.97
         63 |          1        0.01       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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