Frequencies for first 10,000 rows of hlt_difwalk variable in mcbsatc2013 datase

        Lvl |
  difficult |
   walk 1/4 |
mile or 2-3 |
      block |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |         33        0.33        0.33
         -7 |          2        0.02        0.35
          1 |      4,954       49.54       49.89
          2 |      1,072       10.72       60.61
          3 |      1,126       11.26       71.87
          4 |        991        9.91       81.78
          5 |      1,822       18.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 24 May 2016