Athlete		Records by age
Name	Born	Made in career	Still unbeaten	%	Records' list
Usain Bolt	JAM, 1986	10	2	20	16 17 18 19 20 22 23  24 25 26
Donald Quarrie	JAM, 1951	9	0	0	20 24 25 26 27 29 31 33 37
Frank Fredericks	NAM, 1967	7	2	28,6	26 30 31 32 35 36 37
Carl Lewis	USA, 1961	6	0	0	22 23 26 31 32 34
Pietro Mennea	ITA,  1952	6	0	0	25 27 28 31 32 35
Linford Christie	GB,  1960	5	0	0	30 33 35 36 37
Tyson Gay	USA, 1982	4	2	50	24 25 27 28
Michael Johnson	USA, 1967	4	1	25	24 28 29 33
Edwin Roberts	USA, 1941	4	0	0	27 28 29 30

KEY
24	Beaten record
20	Unbeaten record