Question: The 2012 British GT Championship was won by a car that was first introduced in what year?

Context paragraphs:
2016 British GT Championship: The 2016 British GT Championship will be the 24th British GT Championship.  The season will begin on 17 April at Brands Hatch and finish on 11 September at Donington Park, after nine rounds held over seven meetings.  After using Avon Tyres since 2006, the championship will switch to Pirelli tyres this season in order to mirror that of other GT3 and GT4 categories promoted by Stéphane Ratel Organisation.

Michael Caine (racing driver): Michael Caine (born 13 August 1969 in Cambridge) is a British auto racing racing driver.  He currently competes in the British GT Championship and the British Touring Car Championship.  He was the 2012 British GT champion along with Daniele Perfetti.

2004 British GT Championship: The 2004 British GT season consisted of an eight-round series of sports car racing in the British GT Championship, with each round consisting of two races.  The series was open to N-GT and GT Cup class cars.  Jonathan Cocker won the N-GT Class Driver's Championship, whilst Adam Wilcox and Ni Amorim shared the GT Cup Driver's Championship.

2012 British GT Championship: The 2012 Avon Tyres British GT season was the 20th season of the British GT Championship.  The season began on 9 April at Oulton Park and finished on 30 September at Donington Park, after ten rounds held over seven meetings.  Motorbase Performance drivers Michael Caine and Daniele Perfetti won the GT3 category in a Porsche 997 GT3-R, Team WFR's Jody Fanin and Warren Hughes won the GT4 championship driving a Ginetta G50, while Ryan Hooker and Gary Eastwood took the GTC title in a Ferrari 458 Challenge driving for FF Corse.

British GT Championship: The Avon Tyres British GT Championship (previously known as the BRDC GT Championship) is a sports car racing series based in the United Kingdom, although selected races do take place outside of the country.  The series was originally created by the British Racing Drivers' Club in 1993 and, for its first two seasons, was known as the National Sports GT Challenge.  The series is currently run by the Stéphane Ratel Organisation, while Pirelli began its first season as the championship's official sole tyre supplier in 2016.

Porsche 911 GT3: The Porsche 911 GT3 is a high performance version of the Porsche 911 sports car primarily intended for racing.  It is a line of high-performance models, which began with the 1973 911 Carrera RS.  The GT3, introduced in 1999, is named after the Fédération Internationale de l'Automobile (FIA) Group GT3 class, created in 2005, in which it was designed to compete.

Embassy Racing: Embassy Racing was a British auto racing team founded by Jonathan France in 2003.  Initially created as a conjunction with Xero Competition in the British GT Championship, the team expanded to become an independent team and began to win races in British GT before the team took a sabbatical year in 2006.  Upon their return to motorsport, Embassy moved to the international Le Mans Series, running in a Le Mans Prototype class, as well as entering the British Superbike Championship's junior leagues, the Supersport and Superstock Championships, running with the support of Triumph Motorcycles under the MAP Embassy Triumph banner.

McLaren F1 GTR: The McLaren F1 GTR was a racing variant of the McLaren F1 sports car first produced in 1995 for grand touring style racing, such as the BPR Global GT Series, FIA GT Championship, JGTC, and British GT Championship.  It is most famous for its overall victory at the 1995 24 Hours of Le Mans where it won against faster purpose-built prototypes.  McLaren F1 GTRs raced internationally until 2005 when the final race chassis was retired.

2017 British GT Championship: The 2017 British GT Championship will be the 25th British GT Championship, a sports car championship promoted by the Stéphane Ratel Organisation (SRO).  The season will begin on 15 April at Oulton Park and finish on 24 September at Donington Park, after ten rounds held over seven meetings.

2006 British GT Championship: The 2006 British GT season consisted of a fourteen-round series of sports car racing in the British GT Championship.  The season consisted of two 2-hour enduros at Donington Park and Silverstone, with 4 other double 1 hour-race events held in England, 2 in France (held alongside the FFSA GT Championship) and 1 in Ireland.  It was contested by GT2 cars, the renamed GT3 class (now GTC), and a new GT3 class conforming with new FIA regulations.  This would be the last year of competition for GT2 cars, with very low grids and thus half points being awarded at most races.  The following year, GT3 became the main class, with GTC supporting.

Supporting paragraphs: 2012 British GT Championship Porsche 911 GT3
Answer: 1999