How many NBA teams were there in 1960-61 to 1975-76?

	TEAM	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF
1	Celtics	1,298	241.0	114.1	63.8	24.4	7.3	3.5	45.3	104.3	43.4	23.5	31.4	75.0	48.3	16.5	36.6		312,845	148,144	82,803	31,724	1,784	853		32,667
2	Knicks	1,298	241.2	110.0	55.9	22.7	7.2	3.4	43.7	97.5	44.8	22.7	31.0	73.2	49.5	12.0	32.9		313,120	142,750	72,579	29,432	1,781	836		33,301
3	Warriors	1,298	241.5	112.8	63.6	23.6	10.4	5.0	44.7	102.0	43.8	23.5	32.6	72.1	48.5	16.8	35.8		313,420	146,453	82,504	30,661	2,568	1,231		31,792
4	Pistons	1,298	241.2	110.5	58.0	21.3	9.2	4.6	43.2	98.4	43.9	24.1	33.0	72.9	48.9	13.8	31.5		313,070	143,481	75,328	27,650	2,258	1,131		32,777
5	Lakers	1,298	241.5	113.9	59.9	24.3	9.0	6.5	44.2	97.5	45.3	25.5	34.3	74.2	50.6	15.5	35.0		313,420	147,905	77,702	31,493	2,223	1,604		31,011
6	Kings	1,298	241.2	113.1	57.7	24.1	9.2	4.3	44.1	96.9	45.5	24.9	32.9	75.9	50.8	13.2	32.4		313,020	146,797	74,904	31,269	2,271	1,055		33,143
7	76ers	1,298	241.0	114.5	60.4	22.9	8.7	3.5	44.5	100.7	44.2	25.4	34.8	73.2	49.4	15.3	32.6		312,820	148,642	78,339	29,685	2,141	850		33,920
8	Hawks	1,298	241.0	111.6	58.5	23.7	9.3	3.4	43.3	97.2	44.5	25.0	34.0	73.3	49.7	15.9	32.1		312,870	144,799	75,871	30,729	2,292	836		33,070
9	Bullets	1,219	241.4	111.2	59.2	21.8	9.5	5.4	44.0	98.9	44.5	23.2	32.0	72.7	49.2	14.0	34.4		294,235	135,600	72,222	26,550	2,328	1,335		29,748
10	Bulls	819	241.4	106.4	53.5	22.9	8.4	3.9	41.6	95.4	43.6	23.2	30.7	75.7	48.9	14.7	33.0		197,710	87,156	43,794	18,748	2,059	950		19,707
11	Rockets	738	241.0	111.1	53.4	24.4	8.7	4.5	44.2	98.9	44.7	22.7	30.3	75.1	49.5	13.4	31.4		177,845	81,967	39,435	18,015	2,129	1,117		18,680
12	SuperSonics	738	241.3	110.2	52.0	24.6	9.7	4.2	43.6	96.7	45.1	22.9	30.9	74.3	50.0	15.0	31.6		178,045	81,349	38,353	18,160	2,392	1,027		18,544
13	Bucks	656	241.1	109.9	51.2	25.4	8.3	5.6	45.2	94.4	47.8	19.5	26.1	74.7	51.9	13.2	33.9		158,165	72,063	33,587	16,659	2,037	1,387		15,484
14	Suns	656	241.6	110.9	50.2	24.2	8.8	3.9	43.1	95.2	45.3	24.6	32.6	75.6	50.6	14.4	32.4		158,465	72,734	32,949	15,858	2,175	971		16,670
15	Braves	492	241.1	106.3	48.7	25.0	9.0	5.8	42.9	93.2	46.1	20.4	27.4	74.2	50.5	13.3	33.7		118,605	52,280	23,941	12,279	2,224	1,422		12,147
16	Cavaliers	492	241.3	101.9	47.3	24.4	7.5	4.2	41.7	94.7	44.0	18.5	24.8	74.6	48.2	14.3	30.8		118,705	50,143	23,250	12,026	1,836	1,038		11,668
17	Trail Blazers	492	241.1	107.2	48.3	26.1	9.5	4.7	43.1	94.2	45.7	21.1	28.5	73.9	50.2	13.9	33.3		118,630	52,735	23,752	12,828	2,328	1,149		12,063
18	Jazz	164	241.5	102.8	47.1	21.8	9.0	3.7	40.6	91.5	44.4	21.6	28.4	76.1	49.4	14.2	32.9	21.1	39,610	16,854	7,728	3,583	1,475	599	3,461	4,397