Has anybody read all the winners?

Here are the ones I've read:
1815 Staying On a novel by Paul Scott (read 28 Nov 1983) (Booker prize in 1977)
1818 The Sea, The Sea, by Iris Murdoch (read 4 Dec 1983) (Booker prize in 1978)
2921 The English Patient a novel by Michael Ondaatje (read 18 Oct 1996) (Booker prize in 1992)
3034 Possession: A Romance, by A. S. Byatt (read 14 Nov 1997) (Booker prize in 1990)
3066 Saville, by David Storey (read 15 Apr 1998) (Booker prize in 1976)
3067 Moon Tiger, by Penelope Lively (read 17 Apr 1998) (Booker prize in 1987)
3077 Offshore, by Penelope Fitzgerald (read 16 May 1998) (Booker prize in 1979)
3080 Rites of Passage, by William Golding (read 30 May 1998) (Booker prize in 1980)
3146 The Remains of the Day, by Kazuo Ishiguro (read 6 Jan 1999) (Booker prize in 1989)
3151 Paddy Clarke Ha Ha Ha, by Roddy Doyle (read 21 Jan 1999) (Booker prize in 1993)
3215 Amsterdam, by Ian McEwan (read 6 Jul 1999) (Booker prize in 1998)
3260 The God of Small Things, by Arundhati Roy (read 24 Oct 1999) (Booker prize in 1997)
3268 The Ghost Road, by Pat Barker (read 15 Nov 1999) (Booker prize in 1995)
3271 Sacred Hunger, by Barry Unsworth (read 26 Nov 1999) (Booker prize in 1992)
3318 Last Orders, by Graham Swift (read 4 Jun 2000) (Booker prize in 1996)
3386 The Blind Assassin, by Margaret Atwood (read 6 Jan 2001) (Booker prize in 2000)
3399 Disgrace, by J. M. Coetzee (read 31 Jan 2001) (Booker prize in 1999)
3401 The Bone People A Novel by Keri Hulme (read 4 Feb 2001) (Booker prize in 1985)
3534 True History of the Kelly Gang, by Peter Carey (read 30 Jan 2002) (Booker prize in 2001)
3674 Midnight's Children, by Salman Rushdie (read 5 Jan 2003) (Booker prize in 1981)
3678 Schindler's List, by Thomas Keneally (read 12 Jan 2003) (Booker prize in 1982)
3715 life of pi A novel, by Yann Martel (read 16 Mar 2003) (Booker prize in 2002)
3822 Vernon God Little, by D B C Pierre (read 8 Nov 2003) (Booker prize in 2003)
3839 Hotel du Lac, by Anita Brookner (read 26 Dec 2003) (Booker prize in 1984)
4057 The Line of Beauty A Novel by Alan Hollinghurst (read 11 Aug 2005) (Booker prize in 2004)
4096 The Sea, by John Banville (read 23 Nov 2005) (Booker prize in 2005)
4227 The Inheritance of Loss, by Kiran Desai (read 6 Nov 2006) (Booker prize in 2006) (National Book Critics Circle fiction award for 2006)

I am wondering if anyone of you has read all the winners

I'll have to go through my books and check which I've read. I see a lot of familiar titles, but I don't know if it's because they are on the list of books I'm searching for or because i've read them. i put together a list of all the winners of a number of different literary prizes in author's name order that i use as a reference when i go to th used book store. It helps me look for specific authors and it also keeps me from buying the same book twice, or from not buying a book because I think I've read it when I've only read the flyleaf. It's hard to remember all the books you've read which is why LT has been great for me. I have a good start on all the books I've read, at least in the past few years.

The BookerPrize reading group is working their way through the winners and shortlisted novels, as well as those longlisted - the longlists have been published since 2000 or 2001.

The group is in fact scheduled to read and discuss two winners: G. by John Berger in September (which you don't have on your list yet) and Last Orders by Graham Swift in October.
Coming up in August is Shirley Hazzard's The Great Fire - while it only reached the Booker longlist, it won the National Book Award.
November will be Colm Toibin's The Blackwater Lightship.

Browsing through the handy-dandy lists of the Booker_winners and Booker_shortlist, I find that I tend to read several of a shortlist - there are multiple years where I have read three or four books from the shortlist+winner combination.