Frequencies for nhvisr variable in namcsphys2005_2010 dataset :

        did |
  physician |
       make |
    nursing |
home visits |
during last |
normal week |
         of |
  practice? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        139        1.87        1.87
         -6 |      2,326       31.23       33.09
          0 |      4,594       61.67       94.76
          1 |        390        5.24      100.00
------------+-----------------------------------
      Total |      7,449      100.00

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