average team defensive rating over the years

The Boston Celtics had a defensive rating of 95.1 in 1973-74.

	TEAM	DRTG	SEASON	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	95.1	1973-74	82	241.2	109.0	54.3	26.7	6.8	3.7	44.3	97.2	45.6	20.5	25.6	80.0	50.3	16.8	37.5	21.9	19,780	8,937	4,452	2,187	561	305	1,796	1,868
2	Knicks	94.7	1973-74	82	241.2	101.3	44.9	23.6	6.8	3.4	42.4	91.3	46.5	16.5	21.2	77.7	50.4	11.7	33.2	17.8	19,780	8,306	3,684	1,937	554	277	1,463	1,884
3	Warriors	98.4	1973-74	82	240.3	109.9	53.8	24.3	8.1	5.5	45.4	97.8	46.4	19.1	24.6	77.8	50.6	16.8	37.0	20.3	19,705	9,011	4,414	1,989	668	450	1,667	1,893
4	Pistons	93.8	1973-74	82	240.9	104.4	47.3	23.9	9.7	5.1	42.1	91.6	45.9	20.2	26.4	76.4	50.5	14.6	32.7	21.5	19,755	8,560	3,881	1,956	793	419	1,763	1,930
5	Lakers	96.6	1973-74	82	240.9	109.2	52.9	26.6	9.7	8.0	43.1	95.2	45.3	22.9	29.8	76.9	50.4	16.6	36.2	23.3	19,755	8,951	4,335	2,179	794	653	1,913	2,032
6	Kings	99.5	1973-74	82	240.3	102.0	44.7	21.3	9.7	4.7	41.1	89.5	45.9	19.9	25.7	77.4	50.6	13.6	31.1	21.8	19,705	8,366	3,666	1,744	796	384	1,791	1,916
7	76ers	99.0	1973-74	82	240.6	101.2	46.4	21.9	9.2	2.7	40.6	93.9	43.2	19.9	25.8	77.1	48.0	14.4	32.0	20.3	19,730	8,295	3,808	1,799	756	220	1,665	1,964
8	Hawks	99.0	1973-74	82	240.9	108.6	48.2	24.3	9.2	4.0	43.9	94.4	46.5	20.8	27.6	75.2	51.0	15.1	33.1	22.2	19,755	8,907	3,952	1,993	758	332	1,823	2,073
9	Bullets	94.2	1973-74	82	240.6	101.9	50.9	21.6	8.6	5.4	42.4	96.2	44.1	17.0	22.8	74.5	48.0	15.7	35.2	19.1	19,730	8,353	4,173	1,770	703	441	1,568	1,746
10	Bulls	93.6	1973-74	82	241.2	102.0	45.8	22.8	9.3	3.9	40.1	90.0	44.6	21.8	28.2	77.1	49.8	13.9	31.9	20.6	19,780	8,368	3,759	1,868	764	316	1,690	1,874
11	Rockets	100.5	1973-74	82	242.1	107.4	44.5	27.0	8.9	5.0	43.5	90.6	48.0	20.5	25.3	81.2	52.8	13.0	31.6	20.5	19,855	8,810	3,651	2,212	727	407	1,681	2,104
12	SuperSonics	99.1	1973-74	82	240.9	107.0	49.1	25.7	8.4	3.6	43.7	98.2	44.5	19.6	25.5	76.7	48.9	16.1	33.0	19.8	19,755	8,774	4,029	2,106	689	294	1,622	2,074
13	Bucks	93.6	1973-74	82	240.9	107.1	49.0	27.1	8.9	6.3	45.4	92.3	49.2	16.2	21.2	76.3	52.7	13.8	35.1	20.7	19,755	8,780	4,014	2,225	726	519	1,694	1,864
14	Suns	101.3	1973-74	82	240.9	107.9	46.5	25.0	8.0	3.7	43.4	94.2	46.0	21.2	27.3	77.7	50.8	13.3	33.2	20.3	19,755	8,847	3,813	2,052	658	305	1,666	2,123
15	Braves	99.4	1973-74	82	241.8	111.6	48.5	26.4	9.6	7.3	45.5	94.7	48.0	20.7	27.1	76.5	52.4	14.0	34.5	22.3	19,830	9,155	3,980	2,165	786	600	1,828	1,875
16	Cavaliers	100.1	1973-74	82	240.9	100.3	45.9	25.0	7.3	3.6	41.7	94.9	43.9	16.8	21.8	77.2	48.0	15.5	30.4	18.8	19,755	8,221	3,767	2,048	598	293	1,545	1,925
17	Trail Blazers	102.6	1973-74	82	240.6	106.8	47.0	25.7	9.7	4.2	43.7	93.7	46.7	19.4	25.8	75.3	50.9	15.3	31.7	22.2	19,730	8,761	3,852	2,106	797	342	1,823	2,050
18	Celtics	94.7	1974-75	82	240.9	106.5	52.0	26.3	8.1	3.5	43.7	95.4	45.8	19.0	24.0	79.1	50.2	16.0	36.0	19.8	19,755	8,734	4,264	2,159	662	288	1,625	1,913
19	Knicks	98.3	1974-75	82	240.6	100.4	44.3	20.4	8.0	3.7	41.0	91.0	45.0	18.5	24.0	77.2	49.4	12.0	32.3	16.8	19,730	8,236	3,633	1,675	652	300	1,374	2,001
20	Warriors	97.3	1974-75	82	241.2	108.5	52.1	25.3	11.9	4.5	45.3	97.3	46.5	17.9	23.4	76.8	50.4	17.3	34.8	20.9	19,780	8,898	4,270	2,076	972	365	1,716	2,109
21	Pistons	99.7	1974-75	82	240.3	98.9	42.9	23.4	8.3	4.6	40.1	86.0	46.6	18.7	24.1	77.6	51.2	12.2	30.7	19.0	19,705	8,111	3,517	1,916	679	380	1,557	1,866
22	Lakers	99.9	1974-75	82	242.1	103.2	49.7	25.5	9.2	5.2	41.6	92.4	45.0	20.0	26.6	75.2	49.5	16.0	33.7	21.8	19,855	8,459	4,075	2,091	755	423	1,785	2,079
23	Kings	97.1	1974-75	82	240.6	101.4	45.6	22.6	8.8	4.2	39.7	88.5	44.9	21.9	26.7	82.1	50.5	12.1	33.5	18.8	19,730	8,311	3,736	1,853	724	347	1,542	1,968
24	76ers	98.8	1974-75	82	241.5	99.8	47.6	20.8	7.0	3.2	40.5	91.2	44.5	18.7	24.9	74.9	48.8	14.6	33.0	19.4	19,805	8,180	3,906	1,709	576	263	1,591	1,974
25	Hawks	99.5	1974-75	82	241.5	105.1	49.9	22.9	9.1	2.8	41.8	95.4	43.8	21.6	29.7	72.8	48.5	17.6	32.4	18.9	19,805	8,620	4,094	1,878	744	227	1,550	1,964