Frequencies for first 10,000 rows of citrspop variable in natl1996 dataset :

 Population |
     size - |
   place of |
  residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |          2        0.02        0.04
          2 |        708        7.08        7.12
          3 |      1,536       15.36       22.48
          9 |      7,752       77.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015