Frequencies for first 10,000 rows of opdwt variable in nhamcsopd2009 dataset :

 opd weight |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,936       99.36       99.36
          1 |          6        0.06       99.42
          2 |          4        0.04       99.46
          3 |         10        0.10       99.56
          4 |          5        0.05       99.61
          5 |          2        0.02       99.63
          6 |          7        0.07       99.70
          8 |          4        0.04       99.74
          9 |          2        0.02       99.76
         10 |          4        0.04       99.80
         11 |          3        0.03       99.83
         12 |          3        0.03       99.86
         14 |          1        0.01       99.87
         15 |          2        0.02       99.89
         17 |          1        0.01       99.90
         18 |          1        0.01       99.91
         19 |          2        0.02       99.93
         20 |          2        0.02       99.95
         27 |          1        0.01       99.96
         37 |          1        0.01       99.97
         81 |          2        0.02       99.99
         89 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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