Frequencies for first 10,000 rows of prov1495 variable in pos2001 dataset :

lpns/lvns - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,988       99.88       99.88
        .25 |          1        0.01       99.89
        .75 |          1        0.01       99.90
          1 |          4        0.04       99.94
        1.5 |          1        0.01       99.95
          2 |          1        0.01       99.96
          3 |          1        0.01       99.97
          4 |          2        0.02       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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