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:
| Class | Operator | No. Built | Year Built | Cars per Set | Unit nos. |
| --- | --- | --- | --- | --- | --- |
| Class 170/1 | CrossCountry | 17.0 | 1998–1999 | 3.0 | 170 101 - 170 110 |
| Class 170/1 | CrossCountry | 17.0 | 1998–1999 | 2.0 | 170 111 - 170 117 |
| Class 170/2 | Greater Anglia | 12.0 | 1999 | 3.0 | 170 201 - 170 208 |
| Class 170/2 | Greater Anglia | 12.0 | 2002 | 2.0 | 170 270 - 170 273 |
| Class 170/3 | First TransPennine Express | 9.0 | 2000 | 2.0 | 170 301 - 170 309 |
| Class 170/3 | First ScotRail | 4.0 | 2004 | 3.0 | 170 393 - 170 396 |
| Class 170/3 | CrossCountry | 2.0 | 2002 | 3.0 | 170 397 - 170 398 |
| Class 170/4 | First ScotRail | 24.0 | 1999–2001 | 3.0 | 170 401 - 170 424 |
| Class 170/4 | First ScotRail | 10.0 | 2003–2004 | 3.0 | 170 425 - 170 434 |
| Class 170/4 | First ScotRail | 12.0 | 2004–2005 | 3.0 | 170 450 - 170 461 |
| Class 170/4 | First ScotRail | 2.0 | 2001 | 3.0 | 170 470 - 170 471 |
| Class 170/4 | First ScotRail | 7.0 | 2004 | 3.0 | 170 472 - 170 478 |
| Class 170/5 | London Midland | 17.0 | 1999–2000 | 2.0 | 170 501 - 170 517 |
| Class 170/5 | CrossCountry | 6.0 | 1999–2000 | 2.0 | 170 518 - 170 523 |
| Class 170/6 | London Midland | 6.0 | 2000 | 3.0 | 170 630 - 170 635 |
Question:
What year was number 7 built?
Answer:
2004.0