Frequencies for specialneedsplantype variable in snp2013 dataset :

       Special Needs Plan Type |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
                               |          1        0.01        0.01
Chronic or Disabling Condition |      6,473       54.48       54.49
                 Dual-Eligible |      4,871       40.99       95.48
                 Institutional |        537        4.52      100.00
-------------------------------+-----------------------------------
                         Total |     11,882      100.00

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