Frequencies for first 10,000 rows of prov1495 variable in pos1992 dataset :

lpns/lvns - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,991       99.91       99.91
         .1 |          1        0.01       99.92
        .25 |          1        0.01       99.93
         .5 |          1        0.01       99.94
          1 |          4        0.04       99.98
          2 |          1        0.01       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016