Frequencies for first 10,000 rows of lpn_lvn_vlntr_cnt variable in pos2010 dataset :

LPNS/LVNS - |
  VOLUNTEER |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,992       99.92       99.92
        .75 |          1        0.01       99.93
          1 |          2        0.02       99.95
          2 |          2        0.02       99.97
          3 |          1        0.01       99.98
          7 |          1        0.01       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017