Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Game | Genre | Platform(s) | Developer(s) |
| --- | --- | --- | --- | --- |
| 2003.0 | Star Wars: Knights of the Old Republic | ( Role-Playing Game ) Turn-Based | Windows , Xbox | Bioware |
| 2004.0 | Halo 2 | ( First-Person ) Shooter | Windows , Xbox | Bungie |
| 2005.0 | Resident Evil 4 | Survival Horror : ( Third-Person ) Shooter | GameCube , PlayStation 2 , Windows , Wii | Capcom |
| 2006.0 | The Legend of Zelda: Twilight Princess | Action-Adventure | Wii , Nintendo GameCube | Nintendo |
| 2007.0 | BioShock | ( First-Person ) Shooter : Survival Horror | Windows , Xbox 360 , Mac OS X , PlayStation 3 | 2K Boston/2K Australia |
| 2008.0 | Fable II | Action RPG : Sandbox | Xbox 360 | Lionhead Studios |
| 2009.0 | Uncharted 2: Among Thieves | Action-Adventure : ( Third-Person ) Shooter | PlayStation 3 | Naughty Dog |
| 2010.0 | Mass Effect 2 | Action RPG : ( Third-Person ) Shooter | Xbox 360 , Windows , PlayStation 3 | BioWare |
| 2011.0 | The Elder Scrolls V: Skyrim | Action RPG : Open World | Xbox 360 , Windows , PlayStation 3 | Bethesda Game Studios |
| 2012.0 | Borderlands 2 | First-person shooter | Xbox 360 , Windows , Playstation 3 , OS X | Gearbox Software |
Question:
What is total number of years that has genre of first-person shooter?
Answer:
2012.0