I did a thread a few weeks ago on esb to try and put a list of all of the PPVs that Sky have done since they started. Below is the list - not sure what is missing or if all of it is correct, but you could go through that lot to check how many first round KOs happened on a Sky PPV....
2011
HAYE-KLITSCHKO 2ND JULY 2011
http://boxrec.com/date_search.php?yyyy=2011&mm=07&dd=02
CLEVERLY-BELLEW/GROVES-DEGALE 21ST MAY 2011
http://boxrec.com/date_search.php?yyyy=2011&mm=05&dd=21
2010
HAYE-HARRISON 13TH NOVEMBER 2010
(800,000 buys)
http://boxrec.com/date_search.php?yyyy=2010&mm=11&dd=13
HAYE-RUIZ 3RD APRIL 2010
http://boxrec.com/date_search.php?yyyy=2010&mm=04&dd=03
MAGNIFICENT 7 – 18TH SEPTEMBER 2010
http://boxrec.com/date_search.php?yyyy=2010&mm=09&dd=18
RETURN OF THE MAGNIFICENT 7 & KHAN MAIDANA 11TH DECEMBER 2010
http://boxrec.com/date_search.php?yyyy=2010&mm=12&dd=11
2009
KHAN-SALITA 5TH DECEMBER 2009
http://boxrec.com/date_search.php?yyyy=2009&mm=12&dd=05
HAYE-VALUEV 7TH NOVEMBER 2009
(800,000 buys)
http://boxrec.com/date_search.php?yyyy=2009&mm=11&dd=07
KHAN-KOTELNIK 18TH JULY 2009
http://boxrec.com/date_search.php?yyyy=2009&mm=07&dd=18
HATTON-PACQUIAO 2ND MAY 2009
(450,000 buys)
http://boxrec.com/date_search.php?yyyy=2009&mm=05&dd=02
KHAN-BARRERA 14TH MARCH 2009
http://boxrec.com/date_search.php?yyyy=2009&mm=03&dd=14
2008
KHAN-FAGAN (PACQUIAO-ODLH) 6 DECEMBER 2008
http://boxrec.com/date_search.php?yyyy=2009&mm=03&dd=14
HATTON-LAZCANO 24TH MAY 2008
http://boxrec.com/date_search.php?yyyy=2008&mm=05&dd=24
KHAN-PRESCOTT 6TH SEPTEMBER 2008
http://boxrec.com/date_search.php?yyyy=2008&mm=09&dd=06
2007
HATTON-URANGO 20TH JANUARY 2007
http://boxrec.com/date_search.php?yyyy=2007&mm=01&dd=20
HATTON-MAYWEATHER 8TH DECEMBER 2007
(1 million buys)
http://boxrec.com/date_search.php?yyyy=2007&mm=12&dd=08
2006
HATTON – COLLAZO 13TH MAY 2006
http://boxrec.com/date_search.php?yyyy=2006&mm=05&dd=13
2005
HATTON – MAUSSA 26TH NOVEMBER 2005
http://boxrec.com/date_search.php?yyyy=2005&mm=11&dd=26
HATTON-TSZYU 4TH JUNE 2005
http://boxrec.com/date_search.php?yyyy=2005&mm=06&dd=04
2004
DANNY WILLIAMS – VITALI KLITSCHKO 11TH DECEMBER 2004
http://boxrec.com/date_search.php?yyyy=2004&mm=12&dd=11
HOPKINS - DE LA HOYA 18TH SEPTEMBER 2004
http://boxrec.com/date_search.php?yyyy=2004&mm=09&dd=18
DANNY WILLIAMS – MIKE TYSON 30TH JULY 2004
http://boxrec.com/date_search.php?yyyy=2004&mm=07&DD=30
OSCAR DE LA HOYA - STURM 5TH JUNE 2004
http://boxrec.com/date_search.php?yyyy=2004&mm=06&dd=05
VITALI KLITSCHKO - SAUNDERS 24TH APRIL 2004
http://boxrec.com/date_search.php?yyyy= ... &dd=242003
2003
LEWIS – VITALI KLITSCHKO 21ST APRIL 2003
http://boxrec.com/date_search.php?yyyy=2003&mm=06&dd=21
TYSON – ETIENNE 22ND FEBRUARY 2003
http://boxrec.com/date_search.php?yyyy=2003&mm=02&dd=22
2002
TYSON-LEWIS 8TH JUNE 2002
(760,000 buys)
http://boxrec.com/date_search.php?yyyy=2002&mm=06&dd=08
HAMED-CALVO 18TH MAY 2002
http://boxrec.com/date_search.php?yyyy=2002&mm=05&dd=18
2001
TYSON – NIELSEN 3RD OCTOBER 2001
http://boxrec.com/date_search.php?yyyy=2001&mm=10&dd=13
LEWIS – RAHMAN II 17TH NOVEMBER 2001
http://boxrec.com/date_search.php?yyyy=2001&mm=11&dd=17
HAMED-BARRERA 7TH APRIL 2001
http://boxrec.com/date_search.php?yyyy=2001&mm=04&dd=07
2000
LEWIS – TUA 11TH NOVEMBER 2000
http://boxrec.com/date_search.php?yyyy=2000&mm=11&dd=11
LEWIS – BOTHA 15TH JULY 2000
http://boxrec.com/date_search.php?yyyy=2000&mm=07&dd=15
HAMED – SANCHEZ 19TH AUGUST 2000
http://boxrec.com/date_search.php?yyyy=2000&mm=08&dd=19
TYSON – LOU SAVARESE 24TH JUNE 2000
http://boxrec.com/date_search.php?yyyy=2000&mm=06&dd=24
LEWIS – GRANT 29TH APRIL 2000
http://boxrec.com/date_search.php?yyyy=2000&mm=04&dd=29
HAMED – BUNGU 11TH MARCH 2000
http://boxrec.com/date_search.php?yyyy=2000&mm=03&dd=11
TYSON – JULIUS FRANCIS 29TH JANUARY 2000
(500,000 buys)
http://boxrec.com/date_search.php?yyyy=2000&mm=01&dd=29
1999
TYSON – BOTHA 16TH JANUARY 1999
http://boxrec.com/date_search.php?yyyy=1999&mm=01&dd=16
LEWIS-HOLYFIELD I 13TH MARCH 1999
(400,000 buys)
http://boxrec.com/date_search.php?yyyy=1999&mm=03&dd=13
HAMED – INGLE 10TH APRIL 1999
http://boxrec.com/date_search.php?yyyy=1999&mm=04&dd=10
HAMED – SOTO 22ND OCTOBER 1999
http://boxrec.com/date_search.php?yyyy=1999&mm=10&dd=22
TYSON - NORRIS 23 OCTOBER 1999
http://boxrec.com/date_search.php?yyyy=1999&mm=10&dd=23
LEWIS-HOLYFIELD II 13 NOVEMBER 1999
http://boxrec.com/date_search.php?yyyy=1999&mm=11&dd=13
1998
HAMED – MCCULLOUGH 31ST OCTOBER 1998
http://boxrec.com/date_search.php?yyyy=1998&mm=10&dd=31
LEWIS – BRIGGS 28TH MARCH 1998
http://boxrec.com/date_search.php?yyyy=1998&mm=03&dd=28
HAMED – VAZQUEZ 18TH APRIL 1998
http://boxrec.com/date_search.php?yyyy=1998&mm=04&dd=18
LEWIS – MAVROVIC 26 SEPTEMBER 1998
http://boxrec.com/date_search.php?yyyy=1998&mm=09&dd=26
1997
HAMED – JOHNSON 8TH FEBRUARY 1997
http://boxrec.com/date_search.php?yyyy=1997&mm=07&dd=19
HAMED – HARDY 3RD MAY 1997
http://boxrec.com/date_search.php?yyyy=1997&mm=10&dd=11
TYSON-HOLYFIELD I 28TH JUNE 1997
(550,000 buys)
http://boxrec.com/date_search.php?yyyy=1997&mm=06&dd=28
HAMED – CABRERA 19 JULY 1997
http://boxrec.com/date_search.php?yyyy=1997&mm=07&dd=19
HAMED-BADILLO(/CALZAGHE-EUBANK) 11 OCTOBER 1997
Sheffield, UK
http://boxrec.com/date_search.php?yyyy=1997&mm=10&dd=11
HAMED-KELLEY 19TH DECEMBER 1997
http://boxrec.com/date_search.php?yyyy=1997&mm=12&dd=19
1996
TYSON-HOLYFIELD II 9TH NOVEMBER 1996
http://boxrec.com/date_search.php?yyyy=1996&mm=11&dd=09
TYSON – SELDON 7 SEPTEMBER 1996
http://boxrec.com/date_search.php?yyyy=1996&mm=09&dd=07
TYSON-BRUNO II 16TH MARCH 1996
(660,000 buys)
http://boxrec.com/date_search.php?yyyy=1996&mm=03&dd=16