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2012  World  Top 20 Compiled by Mirko Jalava, Tilastopaja Oy. Text version here.

Women
400 m
1	49.16			Antonina Krivoshapka	RUS	21 Jul 87		1	NC	Cheboksary	5 Jul
2	49.28			Sanya Richards-Ross	USA	26 Feb 85	173/61	1	OT	Eugene OR	24 Jun
3	49.28			Yuliya Gushchina	RUS	4 Mar 83	174/63	2	NC	Cheboksary	5 Jul
4	49.54	NR		Amantle Montsho	BOT	4 Jul 83		1	AfrC	Porto Novo	28 Jun
5	49.70			Christine Ohuruogu	GBR	17 May 84	175/70	2	OG	London	5 Aug
6	49.72			Tatyana Firova	RUS	10 Oct 82	174/59	3	NC	Cheboksary	5 Jul
7	49.72			Deedee Trotter	USA	8 Dec 82	178/65	3	OG	London	5 Aug
8	49.78			Novlene Williams-Mills	JAM	26 Apr 82	167/55	3	Pre	Eugene OR	2 Jun
9	50.00			Natalya Nazarova	RUS	26 May 79	166/56	2s3	NC	Cheboksary	4 Jul
10	50.06			Francena McCorory	USA	20 Oct 88		1	Diamond	New York NY	9 Jun
11	50.08			Rosemarie Whyte	JAM	8 Sep 86		1	Hanzekovic	Zagreb	4 Sep
12	50.34			Shericka Williams	JAM	17 Sep 85	170/64	1	Gyulai	Budapest	20 Aug
13	50.37			Anastasiya Kapachinskaya	RUS	21 Nov 79	173/59	5	NC	Cheboksary	5 Jul
14	50.43			Kseniya Vdovina	RUS	19 Apr 87		2s2	NC	Cheboksary	4 Jul
15	50.48			Kseniya Ustalova	RUS	14 Jan 88		2	Club Ch	Sochi	26 May
16	50.50			Ashley Spencer	USA	8 Jun 93		1-19	WJ	Barcelona	13 Jul
17	50.55			Libania Grenot	ITA	12 Jul 83	175/65	2	Gyulai	Budapest	20 Aug
18	50.61			Lyudmila Litvinova	RUS	8 Jun 85		3s3	NC	Cheboksary	4 Jul
19	50.63			Kaliese Spencer	JAM	6 May 87		1	Rieti 2012	Rieti	9 Sep
20	50.71			Patricia Hall	JAM	16 Oct 82		2	Bislett	Oslo	7 Jun
Hand timing
	50.1h			Kseniya Ustalova	RUS	14 Jan 88		1		Bishkek	21 Apr