Frequencies for specialneedsplantype variable in snp2011 dataset :

       Special Needs Plan Type |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
Chronic or Disabling Condition |      2,312       36.55       36.55
                 Dual-Eligible |      3,499       55.31       91.86
                 Institutional |        515        8.14      100.00
-------------------------------+-----------------------------------
                         Total |      6,326      100.00

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