what is the average age when players retire in the nba

What is the average age per game when players retire in the NBA?

Interpreted as:

	NAME	GP	PPG	RPG	APG	FGM	FGA	FG%	FTM	FTA	FT%	TS%	PTS	REB	AST	PF
1	John Abramovic J. Abramovic	56	9.5		0.7	3.6	15.3	23.7	2.3	3.3	68.6	28.5	533		37	171
2	Chet Aubuchon C. Aubuchon	30	2.2		0.7	0.8	3.0	25.3	0.6	1.2	54.3	30.5	65		20	46
3	Norm Baker N. Baker	4	0.0		0.0	0.0	0.3	0.0	0.0	0.0		0.0	0		0	0
4	Herschel Baltimore H. Baltimore	58	2.4		0.3	0.9	4.5	20.2	0.6	1.2	46.4	23.5	138		16	98
5	John Barr J. Barr	58	5.1		0.9	2.1	7.6	28.3	0.8	1.4	59.5	31.2	295		54	164
6	Frankie Baumholtz F. Baumholtz	45	14.0		1.2	5.7	19.0	29.8	2.7	3.5	77.6	34.1	631		54	93
7	Moe Becker M. Becker	43	3.8		0.7	1.6	8.3	19.6	0.5	1.0	50.0	21.5	162		30	98
8	Hank Beenders H. Beenders	111	8.4		0.5	3.1	11.8	26.5	2.2	3.1	68.7	31.9	935		53	304
9	Hank Biasatti H. Biasatti	6	1.0		0.0	0.3	0.8	40.0	0.3	0.7	50.0	44.4	6		0	3
10	Al Brightman A. Brightman	58	9.8		1.0	3.8	15.0	25.6	2.1	3.3	62.7	29.7	567		60	115
11	Aud Brindley A. Brindley	12	2.8		0.1	1.2	4.1	28.6	0.5	0.6	85.7	32.6	34		1	16
12	Harold Brown H. Brown	54	4.9		0.7	1.8	7.1	24.8	1.4	2.2	63.2	30.4	264		39	122
13	Leon Brown L. Brown	5	0.0		0.0	0.0	0.6	0.0	0.0	0.0		0.0	0		0	2
14	Tommy Byrnes T. Byrnes	264	6.5	1.5	1.2	2.5	8.3	29.9	1.5	2.3	64.8	34.8	1,708	71	311	387
15	Michael Bytzura M. Bytzura	60	3.5		0.5	1.5	5.9	24.4	0.6	1.2	50.0	27.1	210		31	108
16	Tom Callahan T. Callahan	13	1.3		0.3	0.5	2.2	20.7	0.4	0.9	41.7	24.8	17		4	9
17	Ernie Calverley E. Calverley	165	11.9		3.5	4.6	16.0	29.1	2.6	3.7	70.7	33.8	1,961		572	542
18	Chet Carlisle C. Carlisle	51	5.0		0.3	2.0	7.3	26.8	1.1	1.8	60.9	31.0	256		17	136
19	Don Carlson D. Carlson	180	8.0	1.7	1.8	3.3	10.1	33.0	1.4	2.2	62.3	36.4	1,447	15	324	511
20	Bob Cluggish B. Cluggish	54	4.4		0.4	1.7	6.6	26.1	1.0	1.7	57.1	30.0	238		22	113
21	Chuck Connors C. Connors	53	4.5		0.8	1.9	7.4	25.2	0.8	1.6	47.1	27.7	239		41	134
22	Ken Corley K. Corley	3	0.0		0.0	0.0	0.0		0.0	0.0			0		0	0
23	Hal Crisler H. Crisler	4	1.5		0.0	0.5	1.5	33.3	0.5	0.5	100.0	43.6	6		0	6
24	Armand Cure A. Cure	12	0.8		0.0	0.3	1.3	26.7	0.2	0.3	66.7	30.6	10		0	5
25	Howie Dallmar H. Dallmar	146	9.6		2.3	3.6	12.6	28.3	2.5	3.6	69.8	34.1	1,408		340	386