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:
| Outcome | Year | Championship | Surface | Partner | Opponents | Score |
| --- | --- | --- | --- | --- | --- | --- |
| Runner-up | 2002.0 | US Open | Hard | Katarina Srebotnik | Lisa Raymond Mike Bryan | 7–6 (11–9) , 7–6 (7–1) |
| Winner | 2003.0 | US Open | Hard | Katarina Srebotnik | Lina Krasnoroutskaya Daniel Nestor | 5–7, 7–5, [10–5] |
| Winner | 2004.0 | US Open (2) | Hard | Vera Zvonareva | Alicia Molik Todd Woodbridge | 6–3, 6–4 |
| Runner-up | 2006.0 | Wimbledon | Grass | Venus Williams | Vera Zvonareva Andy Ram | 6–3, 6–2 |
| Winner | 2006.0 | US Open (3) | Hard | Martina Navratilova | Květa Peschke Martin Damm | 6–2, 6–3 |
| Winner | 2008.0 | French Open | Clay | Victoria Azarenka | Katarina Srebotnik Nenad Zimonjić | 6–2, 7–6 (7–4) |
| Winner | 2008.0 | Wimbledon | Grass | Samantha Stosur | Katarina Srebotnik Mike Bryan | 7–5, 6–4 |
| Winner | 2009.0 | French Open (2) | Clay | Liezel Huber | Vania King Marcelo Melo | 5–7, 7–6 (7–5) , [10–7] |
Question:
What is the earliest year in which the result is championship US Open (2)?
Answer:
2004.0