Goalies had their highest save percentage in a season in 1955-56, at .919.

Interpreted as:

best NHL goalie save% in a regular season

	POSITION	SV%	SEASON	GP	GS	W	L	T	OTL	SA	SV	GA	GAA	SHO	MIN
1	Goalie	.919	1955-56	421		173	173	74		12,932	11,886	1,046	2.49	43	25189
2	Goalie	.916	1963-64	425		175	175	70		13,771	12,618	1,153	2.75	40	25192
3	Goalie	.915	2015-16	2,644	2,460	1,230	955		275	72,784	66,587	6,197	2.51	152	148159
4	Goalie	.915	2014-15	2,644	2,460	1,230	924		306	73,307	67,050	6,257	2.52	168	148848
5	Goalie	.914	2013-14	2,647	2,460	1,230	923		307	73,683	67,334	6,349	2.56	160	149029
6	Goalie	.914	2011-12	2,651	2,460	1,230	930		300	72,945	66,638	6,307	2.54	176	149126
7	Goalie	.913	2016-17	2,657	2,460	1,230	941	0	289	74,046	67,638	6,408	2.59	158	148234
8	Goalie	.913	2010-11	2,657	2,460	1,230	933		297	74,533	68,040	6,493	2.61	179	149003
9	Goalie	.912	2017-18	2,760	2,542	1,271	975	0	296	80,872	73,774	7,098	2.78	144	153138
10	Goalie	.912	1969-70	960		365	365	182		29,763	27,143	2,620	2.88	69	54647
11	Goalie	.912	2012-13	1,565	1,440	720	558		162	41,827	38,143	3,684	2.54	104	87183
12	Goalie	.911	2009-10	2,658	2,460	1,230	929		301	74,371	67,772	6,599	2.66	155	149118
13	Goalie	.911	2003-04	2,630	2,460	1,060	1,060	340		68,821	62,692	6,129	2.46	191	149268
14	Goalie	.911	1956-57	420		170	170	80		12,462	11,348	1,114	2.65	30	25185
15	Goalie	.910	2018-19	2,720	2,542	1,271	1,000	0	271	79,540	72,371	7,169	2.81	153	152822
16	Goalie	.910	2019-20	2,307	2,164	1,082	832	0	250	67,638	61,522	6,116	2.82	107	130219
17	Goalie	.910	1967-68	967		368	368	152		26,960	24,521	2,439	2.75	74	53213
18	Goalie	.909	2007-08	2,668	2,460	1,230	958		272	71,288	64,812	6,476	2.61	161	148871
19	Goalie	.909	2002-03	2,635	2,460	1,073	1,073	314		69,601	63,256	6,345	2.55	174	149301
20	Goalie	.909	1957-58	422		176	176	68		12,772	11,605	1,167	2.78	37	25187
21	Goalie	.909	1964-65	427		181	181	58		13,063	11,868	1,195	2.85	27	25189
22	Goalie	.908	2008-09	2,650	2,460	1,230	948		282	74,080	67,301	6,779	2.73	156	148873
23	Goalie	.908	1968-69	985		378	379	154		29,287	26,600	2,687	2.95	61	54636
24	Goalie	.908	1960-61	424		171	171	78		13,508	12,264	1,244	2.96	19	25177
25	Goalie	.908	2020-21	1,851	1,735	867	673	0	195	51,732	46,966	4,766	2.74	119	104391