Frequencies for first 10,000 rows of opdwt variable in nhamcsopd2007 dataset :

 opd weight |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,939       99.39       99.39
          2 |          4        0.04       99.43
          3 |          4        0.04       99.47
          4 |          4        0.04       99.51
          5 |          6        0.06       99.57
          6 |          2        0.02       99.59
          7 |          6        0.06       99.65
          8 |          4        0.04       99.69
          9 |          3        0.03       99.72
         10 |          2        0.02       99.74
         11 |          4        0.04       99.78
         12 |          2        0.02       99.80
         13 |          2        0.02       99.82
         14 |          1        0.01       99.83
         15 |          2        0.02       99.85
         16 |          3        0.03       99.88
         17 |          1        0.01       99.89
         20 |          2        0.02       99.91
         21 |          1        0.01       99.92
         24 |          1        0.01       99.93
         25 |          1        0.01       99.94
         31 |          2        0.02       99.96
         40 |          1        0.01       99.97
         64 |          1        0.01       99.98
         65 |          1        0.01       99.99
         87 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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