Frequencies for first 10,000 rows of specialneedsplantype variable in ma2012 dataset :

       Special Needs Plan Type |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
                               |      8,291       82.91       82.91
Chronic or Disabling Condition |        828        8.28       91.19
                 Dual-Eligible |        861        8.61       99.80
                 Institutional |         20        0.20      100.00
-------------------------------+-----------------------------------
                         Total |     10,000      100.00

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