Frequencies for first 10,000 rows of pctpovr variable in nhamcsed2010 dataset :

  Recoded % of population below the |
poverty level in patient's ZIP code |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                       missing data |        619        6.19        6.19
quartile 1 (less than 5.00 percent) |      1,446       14.46       20.65
     quartile 2 (5.00-9.99 percent) |      2,454       24.54       45.19
   quartile 3 (10.00-19.99 percent) |      3,443       34.43       79.62
 quartile 4 (20.00 percent or more) |      2,038       20.38      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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