Frequencies for first 10,000 rows of specialneedsplantype variable in ma2013 dataset :

       Special Needs Plan Type |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
                               |      8,633       86.33       86.33
Chronic or Disabling Condition |        534        5.34       91.67
                 Dual-Eligible |        805        8.05       99.72
                 Institutional |         28        0.28      100.00
-------------------------------+-----------------------------------
                         Total |     10,000      100.00

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