Frequencies for first 10,000 rows of specialneedsplantype variable in ma2011 dataset :

       Special Needs Plan Type |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
                               |      8,448       84.48       84.48
Chronic or Disabling Condition |        660        6.60       91.08
                 Dual-Eligible |        866        8.66       99.74
                 Institutional |         26        0.26      100.00
-------------------------------+-----------------------------------
                         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 14 Apr 2016