Frequencies for first 10,000 rows of mancarec variable in namcs2004 dataset :

   how many |
    managed |
       care |
 contracts? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        228        2.28        2.28
          1 |        861        8.61       10.89
          2 |      1,219       12.19       23.08
          3 |      3,973       39.73       62.81
          4 |      3,719       37.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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