How many teams have had a 3-0 lead in the nlcs Display the year?

	TEAM	SEASON	SERIES	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Braves	1969	NLCS	3	.000	0	3	106	15	27	9	0	5	15	11	1	20	1	0	119	51	14	0	1	3	2	.255	.328	.481	.809
2	Mets	1969	NLCS	3	1.000	3	0	113	27	37	8	1	6	24	10	0	25	5	1	124	65	15	1	0	2	2	.327	.382	.575	.957
3	Reds	1970	NLCS	3	1.000	3	0	100	9	22	3	1	3	8	8	0	12	1	1	108	36	7	0	0	4	2	.220	.278	.360	.638
4	Pirates	1970	NLCS	3	.000	0	3	102	3	23	6	0	0	3	12	0	19	0	2	116	29	6	2	0	2	1	.225	.307	.284	.591
5	Pirates	1971	NLCS	4	.750	3	1	144	24	39	4	0	8	24	5	2	33	2	1	152	67	12	1	0	2	0	.271	.305	.465	.770
6	Giants	1971	NLCS	4	.250	1	3	132	15	31	5	0	5	14	16	1	28	2	0	153	51	10	4	0	3	3	.235	.322	.386	.709
7	Reds	1972	NLCS	5	.600	3	2	166	19	42	9	2	4	16	10	0	28	4	1	180	67	15	3	1	1	1	.253	.294	.404	.697
8	Pirates	1972	NLCS	5	.400	2	3	158	15	30	6	1	3	14	9	2	27	0	1	171	47	10	2	0	3	2	.190	.243	.297	.540
9	Reds	1973	NLCS	5	.400	2	3	167	8	31	6	0	5	8	13	1	42	0	1	185	52	11	3	1	3	3	.186	.247	.311	.559
10	Mets	1973	NLCS	5	.600	3	2	168	23	37	5	0	3	22	19	0	28	0	1	191	51	8	3	1	1	3	.220	.298	.304	.601
11	Pirates	1974	NLCS	4	.250	1	3	129	10	25	1	0	3	10	8	2	17	0	0	141	35	4	2	0	0	5	.194	.252	.271	.523
12	Dodgers	1974	NLCS	4	.750	3	1	137	20	37	8	1	3	19	30	0	16	2	0	169	56	12	2	0	8	2	.270	.401	.409	.810
13	Reds	1975	NLCS	3	1.000	3	0	102	19	29	4	0	4	18	8	1	27	11	0	114	45	8	0	3	0	2	.284	.333	.441	.775
14	Pirates	1975	NLCS	3	.000	0	3	101	7	20	3	0	1	7	10	1	18	0	0	112	26	4	0	0	0	2	.198	.277	.257	.534
15	Reds	1976	NLCS	3	1.000	3	0	99	19	25	5	3	3	18	15	0	16	5	1	118	45	11	1	3	3	1	.253	.342	.455	.796
16	Phillies	1976	NLCS	3	.000	0	3	100	11	27	8	1	1	11	12	0	10	0	1	117	40	10	3	2	1	2	.270	.342	.400	.742
17	Phillies	1977	NLCS	4	.250	1	3	138	14	31	3	0	2	12	11	3	21	1	0	154	40	5	2	0	0	3	.225	.296	.290	.586
18	Dodgers	1977	NLCS	4	.750	3	1	133	22	35	6	1	3	20	14	0	22	3	1	149	52	10	2	0	4	2	.263	.333	.391	.724
19	Phillies	1978	NLCS	4	.250	1	3	140	17	35	3	2	5	16	9	0	21	0	1	152	57	10	2	1	3	4	.250	.293	.407	.700
20	Dodgers	1978	NLCS	4	.750	3	1	147	21	42	8	3	8	21	9	1	22	2	1	159	80	19	2	0	1	4	.286	.331	.544	.875
21	Reds	1979	NLCS	3	.000	0	3	107	5	23	4	1	2	5	11	0	26	4	2	120	35	7	1	1	1	2	.215	.286	.327	.613
22	Pirates	1979	NLCS	3	1.000	3	0	105	15	28	3	2	4	14	13	0	13	4	0	126	47	9	5	3	4	2	.267	.339	.448	.786
23	Phillies	1980	NLCS	5	.600	3	2	190	20	55	8	1	1	19	13	1	37	7	3	210	68	10	5	1	6	2	.289	.337	.358	.694
24	Astros	1980	NLCS	5	.400	2	3	172	19	40	7	5	0	18	31	0	19	4	1	212	57	12	7	2	9	4	.233	.346	.331	.678
25	Dodgers	1981	NLCS	5	.600	3	2	163	15	38	3	1	4	15	12	1	23	5	0	180	55	8	4	0	1	7	.233	.290	.337	.627