Frequencies for first 10,000 rows of opdwt variable in nhamcsopd2011 dataset :

 OPD Weight |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,948       99.48       99.48
          3 |          6        0.06       99.54
          4 |          5        0.05       99.59
          5 |          2        0.02       99.61
          6 |          6        0.06       99.67
          7 |          2        0.02       99.69
          8 |          5        0.05       99.74
         10 |          5        0.05       99.79
         11 |          4        0.04       99.83
         12 |          2        0.02       99.85
         13 |          2        0.02       99.87
         15 |          2        0.02       99.89
         16 |          1        0.01       99.90
         18 |          1        0.01       99.91
         21 |          1        0.01       99.92
         22 |          1        0.01       99.93
         23 |          1        0.01       99.94
         24 |          2        0.02       99.96
         28 |          1        0.01       99.97
         29 |          1        0.01       99.98
         31 |          1        0.01       99.99
         64 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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