what percent of mlb all star mvps started the game

Lefty Grove started 30 times in 1931.

Interpreted as:

What percent of MLB all star mvps in a regular season started by a player the game?

	NAME	GS	MVP	SEASON	TM	G	W	L	W%	ERA	SO	CG	SHO	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Lefty Grove L. Grove	30	1	1931	PHA	30	27	3	.900	1.94	144	27	4	260.1	223	56	73	9	57	1		1,044	2	4.98	1.97	2.53	0.31	13.8	5.5	1.08	.257	2.52	7.71
2	Carl Hubbell C. Hubbell	33	1	1933	NYG	33	20	11	.645	1.77	139	22	10	274.0	231	54	66	6	42	3		1,074	3	4.57	1.38	3.31	0.20	12.9	3.9	1.00	.255	2.17	7.59
3	Dizzy Dean D. Dean	33	1	1934	SLN	33	26	5	.839	2.63	167	24	7	280.2	257	82	97	14	66	6		1,165	2	5.36	2.12	2.53	0.45	14.3	5.7	1.15	.266	3.11	8.24
4	Carl Hubbell C. Hubbell	34	1	1936	NYG	34	24	6	.800	2.27	116	25	3	290.0	250	73	76	6	54	5		1,145	2	3.60	1.68	2.15	0.19	10.1	4.7	1.05	.253	2.36	7.76
5	Bucky Walters B. Walters	36	1	1939	CIN	36	27	8	.771	2.13	131	31	2	312.0	239	74	91	15	102	6		1,246	7	3.78	2.94	1.28	0.43	10.5	8.2	1.09	.226	2.63	6.89
6	Mort Cooper M. Cooper	35	1	1942	SLN	35	22	6	.786	1.73	151	22	10	276.0	203	53	71	8	67	5		1,086	5	4.92	2.18	2.25	0.26	13.9	6.2	0.98	.228	2.32	6.62
7	Spud Chandler S. Chandler	30	1	1943	NYY	30	20	4	.833	1.64	134	20	5	253.0	197	46	62	5	54	4		988	3	4.77	1.92	2.48	0.18	13.6	5.5	0.99	.243	2.21	7.01
8	Hal Newhouser H. Newhouser	34	1	1944	DET	34	25	7	.781	2.43	170	25	6	281.2	246	76	89	6	92	1		1,154	4	5.43	2.94	1.85	0.19	14.7	8.0	1.20	.271	2.84	7.86
9	Hal Newhouser H. Newhouser	36	1	1945	DET	36	24	9	.727	1.75	207	29	8	308.1	234	60	70	5	106	0		1,237	9	6.04	3.09	1.95	0.15	16.7	8.6	1.10	.249	2.04	6.83
10	Bobby Shantz B. Shantz	33	1	1952	PHA	33	24	7	.774	2.48	152	27	5	279.2	230	77	87	21	63	4		1,101	0	4.89	2.03	2.41	0.68	13.8	5.7	1.05	.243	2.80	7.40
11	Don Newcombe D. Newcombe	36	1	1956	BKN	36	25	7	.781	3.11	138	18	5	260.2	213	90	99	33	46	3	8	1,024	3	4.76	1.59	3.00	1.14	13.5	4.5	0.99	.224	3.42	7.35
12	Sandy Koufax S. Koufax	40	1	1963	LAD	40	25	5	.833	1.88	306	20	11	311.0	214	65	68	18	58	3	7	1,210	6	8.86	1.68	5.28	0.52	25.3	4.8	0.87	.238	1.97	6.19
13	Bob Gibson B. Gibson	34	1	1968	STL	34	22	9	.710	1.12	268	28	13	304.2	198	38	49	11	62	7	6	1,161	4	7.92	1.83	4.32	0.32	23.1	5.3	0.85	.230	1.45	5.85
14	Denny McLain D. McLain	41	1	1968	DET	41	31	6	.838	1.96	280	28	6	336.0	241	73	86	31	63	6	2	1,288	3	7.50	1.69	4.44	0.83	21.7	4.9	0.90	.231	2.30	6.46
15	Vida Blue V. Blue	39	1	1971	OAK	39	24	8	.750	1.82	301	24	8	312.0	209	63	73	19	88	4	3	1,207	10	8.68	2.54	3.42	0.55	24.9	7.3	0.95	.239	2.11	6.03
16	Roger Clemens R. Clemens	33	1	1986	BOS	33	24	4	.857	2.48	238	10	1	254.0	179	70	77	21	67	4	0	997	11	8.43	2.37	3.55	0.74	23.9	6.7	0.97	.237	2.73	6.34
17	Justin Verlander J. Verlander	34	1	2011	DET	34	24	5	.828	2.40	250	4	2	251.0	174	67	73	24	57	3	0	969	7	8.96	2.04	4.39	0.86	25.8	5.9	0.92	.236	2.62	6.24
18	Clayton Kershaw C. Kershaw	27	1	2014	LAD	27	21	3	.875	1.77	239	6	2	198.1	139	39	42	9	31	2	0	749	7	10.85	1.41	7.71	0.41	31.9	4.1	0.86	.278	1.91	6.31
19	Shohei Ohtani S. Ohtani	23	1	2021	LAA	23	9	2	.818	3.18	156	0	0	130.1	98	46	48	15	44	10	2	533	10	10.77	3.04	3.55	1.04	29.3	8.3	1.09	.269	3.31	6.77
20	Shohei Ohtani S. Ohtani	23	1	2023	LAA	23	10	5	.667	3.14	167	1	1	132.0	85	46	50	18	55	11	0	531	12	11.39	3.75	3.04	1.23	31.5	10.4	1.06	.239	3.41	5.80