Grand Prix participation by age groups

A little more info on the GP participants.  2684 USATF finishers in the 7 race GP broken out by age groups below.  A bit surprised that the women made up less than 40% of the (USATF) fields.  For both men and women the 40+ and 50+ turnout was about the same (percentage)

f19	f1939	f40	f50	f60	f70	m19	m1939	m40	m50	m60	m70
3	108	38	40	16	1	4	151	70	71	31	19	552
0	101	41	39	16	0	1	134	82	74	19	10	517
13	72	30	22	11	1	20	91	35	46	23	16	380
1	67	31	34	12	0	2	105	51	45	19	11	378
0	40	24	17	7	0	0	73	35	32	13	8	249
2	87	39	51	21	1	0	122	58	63	28	15	487
0	19	15	12	2	0	0	22	22	19	4	6	121
19	494	218	215	85	3	27	698	353	350	137	85	2684
0.71%	18.41%	8.12%	8.01%	3.17%	0.11%	1.01%	26.01%	13.15%	13.04%	5.10%	3.17%	2684
					1034	1650
					38.52%	61.48%