Patient 21 is 36 years old and has a systolic blood pressure of 136 mm Hg. What is the residual?

________mm Hg

Individual	Age	Systolic blood pressure
1	39	144
2	47	220
3	45	138
4	47	145
5	65	162
6	46	142
7	67	170
8	42	124
9	67	158
10	56	154
11	64	162
12	56	150
13	59	140
14	34	110
15	42	128
16	48	130
17	45	135
18	17	114
19	20	116
20	19	124
21	36	136
22	50	142
23	39	120
24	21	120
25	44	160
26	53	158
27	63	144
28	29	130
29	25	125
30	69	175