The Edmonton Oilers had a win percentage of .542 before 1999-00.

	TEAM	W%	SEASON	GP	W	L	T	PTS	PTS%	G	GA	DIFF	PP%	PK%	S/GP	S%	SA/GP	SV%
1	Oilers	.431	1979-80	80	28	39	13	69	.431	301	322	-21	22.3	76.4	28.36	13.3	30.78	.869
2	Oilers	.463	1980-81	80	29	35	16	74	.463	328	327	1	22.2	75.4	29.84	13.7	29.51	.861
3	Oilers	.694	1981-82	80	48	17	15	111	.694	417	295	122	25.6	81.7	33.63	15.5	31.73	.884
4	Oilers	.663	1982-83	80	47	21	12	106	.663	424	315	109	29.3	77.5	33.33	15.9	32.42	.879
5	Oilers	.744	1983-84	80	57	18	5	119	.744	446	314	132	25.5	79.7	32.64	17.1	33.01	.881
6	Oilers	.681	1984-85	80	49	20	11	109	.681	401	298	103	25.7	78.3	32.44	15.5	32.85	.887
7	Oilers	.744	1985-86	80	56	17	7	119	.744	426	310	116	26.3	81.1	33.06	16.1	34.73	.888
8	Oilers	.663	1986-87	80	50	24	6	106	.663	372	284	88	22.4	80.0	29.46	15.8	29.63	.880
9	Oilers	.619	1987-88	80	44	25	11	99	.619	363	288	75	21.9	80.8	29.26	15.5	29.55	.878
10	Oilers	.525	1988-89	80	38	34	8	84	.525	325	306	19	19.8	82.8	27.81	14.6	30.40	.874
11	Oilers	.563	1989-90	80	38	28	14	90	.563	315	283	32	20.6	80.3	28.15	14.0	29.06	.878
12	Oilers	.500	1990-91	80	37	37	6	80	.500	272	272	0	17.5	79.4	27.59	12.3	30.35	.888
13	Oilers	.513	1991-92	80	36	34	10	82	.513	295	297	-2	18.6	78.0	27.71	13.3	31.06	.880
14	Oilers	.357	1992-93	84	26	50	8	60	.357	242	337	-95	15.9	77.2	27.94	10.3	33.76	.881
15	Oilers	.381	1993-94	84	25	45	14	64	.381	261	305	-44	18.4	80.5	30.35	10.2	34.42	.895
16	Oilers	.396	1994-95	48	17	27	4	38	.396	136	183	-47	16.2	77.7	29.73	9.5	30.60	.875
17	Oilers	.415	1995-96	82	30	44	8	68	.415	240	304	-64	15.9	80.8	29.99	9.8	30.40	.878
18	Oilers	.494	1996-97	82	36	37	9	81	.494	252	247	5	18.0	82.5	30.74	10.0	31.17	.903
19	Oilers	.488	1997-98	82	35	37	10	80	.488	215	224	-9	15.9	83.7	28.67	9.1	28.21	.903
20	Oilers	.476	1998-99	82	33	37	12	78	.476	230	226	4	14.4	82.1	29.22	9.6	27.11	.898
	Total	.542		1,584	759	626	199	1,717	.542	6,261	5,737	524	20.1	79.9	29.99	13.2	31.05	.883