how many nba teams that won the championship while being undefeated at home

The Philadelphia Warriors won 1 championship at home in 1946-47.

Interpreted as:

How many NBA teams that won the championship in a regular season while being undefeated at home?

	TEAM	CHAMPS	SEASON	GP	MPG	PPG	RPG	APG	FGM	FGA	FG%	FTM	FTA	FT%	TS%	MIN	PTS	REB	AST	PF
1	Warriors	1	1946-47	30	240.0	69.6			26.0			17.6				7,200	2,087
2	Bullets	1	1947-48	24	242.1	77.5			28.1			21.3				5,810	1,861
3	Lakers	1	1948-49	29	240.0	86.3			33.2			19.9	28.3	70.2		6,960	2,502
4	Lakers	1	1949-50	31	240.8	89.9		22.9	34.3	93.4	36.7	21.3	29.5	72.2	42.3	7,465	2,787		709	767
5	Royals	1	1950-51	34	250.3	90.5			32.2			26.2	33.9	77.2		8,510	3,078
6	Lakers	1	1951-52	26	246.7	88.9			34.1	88.2	38.6	20.7	28.7	72.3	44.1	6,415	2,311			611
7	Lakers	1	1952-53	26	241.9	87.1			31.4	78.5	40.0	24.3	33.8	71.9	46.6	6,290	2,265			684
8	Lakers	1	1953-54	25	240.0	83.8			31.2	79.3	39.4	21.4	29.2	73.3	45.5	6,000	2,096			616
9	Nationals	1	1954-55	32	240.8	94.9			34.0			26.9	35.3	76.3		7,705	3,036			763
10	Warriors	1	1955-56	28	242.7	107.5	62.8	29.0	38.2	93.9	40.7	31.1	40.7	76.6	48.1	6,795	3,010	1,758	811	775
11	Celtics	1	1956-57	31	240.8	109.4			41.9			25.6	34.7	73.8		7,465	3,391			784
12	Hawks	1	1957-58	31	240.0	110.2			39.3			31.7	44.1	71.9		7,440	3,417			818
13	Celtics	1	1958-59	30	244.2	122.9			48.5	119.6	40.5	26.0	33.4	77.8	45.8	7,325	3,688			729
14	Celtics	1	1959-60	27	240.0	128.1	79.8		53.1			22.0	29.8	73.8		6,480	3,459	2,154		636
15	Celtics	1	1960-61	28	240.9	125.9			50.1			25.6	35.5	72.0		6,745	3,524			715
16	Celtics	1	1961-62	28	240.9	129.9			51.8			26.4	35.5	74.4		6,745	3,638			675
17	Celtics	1	1962-63	30	240.0	125.4			50.7			23.9	33.3	71.8		7,200	3,761			758
18	Celtics	1	1963-64	30	240.8	116.7	65.3	24.5	47.2	109.2	43.2	22.3	31.2	71.7	47.5	7,225	3,500	1,960	736	803
19	Celtics	1	1964-65	30	240.8	115.5	66.0		45.3	108.2	41.9	24.9	33.3	74.8	47.0	7,225	3,465	1,979		776
20	Celtics	1	1965-66	31	240.8	115.4			44.7			25.9	34.6	74.9		7,465	3,576
21	76ers	1	1966-67	30	240.8	127.2	67.7	29.8	49.2	101.1	48.7	28.8	43.1	66.7	53.0	7,225	3,815	2,032	895	733
22	Celtics	1	1967-68	37	240.0	116.2			44.9			26.3	35.9	73.2		8,880	4,300			971
23	Celtics	1	1968-69	36	240.7	111.3	60.4	22.7	43.4	101.6	42.8	24.4	33.7	72.4	47.8	8,665	4,006	2,173	818	929
24	Knicks	1	1969-70	41	241.2	116.7			47.0			22.7	31.3	72.5		9,890	4,786			1,034
25	Bucks	1	1970-71	36	242.1	121.5			49.8			22.0	29.4	75.0		8,715	4,375			813