Table 2 Median WTA Tour career length before and after the introduction of the age eligibility rule.

Age turned professional	Playing status	Before (on 31 December 1994)		After (on 10 April 2004)
		Player count	Median years active professional	Player count	Median years active professional
⩽14	Retired	33	4.9	1	2.6
	Active	49	3.2	43	6.5
	Total	82	4.2	44	6.5
15	Retired	55	5.7	2	6.8
	Active	40	3.2	39	6.5
	Total	95	4.7	41	6.5
16	Retired	47	6.3	1	6.4
	Active	28	2.7	20	6.4
	Total	75	5.4	21	6.4
17	Retired	13	5.3	2	6.1
	Active	12	3.9	7	5.9
	Total	25	4.5	9	6
All ages	Retired	148	5.8	6	6.1
	Active	129	3.2	109	6.5
	Total	277	4.7	115	6.4