Frequencies for psi_4_surg_comp_betterstr variable in vwhqi_hosp_ahrq_state dataset :

PSI_4_SURG_CO |
    MP_BETTER |      Freq.     Percent        Cum.
--------------+-----------------------------------
            0 |         29       51.79       51.79
            1 |          7       12.50       64.29
           10 |          1        1.79       66.07
            2 |          6       10.71       76.79
            4 |          5        8.93       85.71
            6 |          1        1.79       87.50
            8 |          1        1.79       89.29
Not Available |          6       10.71      100.00
--------------+-----------------------------------
        Total |         56      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016