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 | Opponent in final | Score in final |
| --- | --- | --- | --- | --- | --- |
| Winner | 1998.0 | US Open | Hard | Martina Hingis | 6–3, 7–5 |
| Winner | 1999.0 | Wimbledon | Grass | Steffi Graf | 6–4, 7–5 |
| Winner | 2000.0 | Australian Open | Hard | Martina Hingis | 6–1, 7–5 |
| Runner-up | 2000.0 | Wimbledon | Grass | Venus Williams | 6–3, 7–6 |
| Runner-up | 2000.0 | US Open | Hard | Venus Williams | 6–4, 7–5 |
| Runner-up | 2005.0 | Australian Open | Hard | Serena Williams | 2–6, 6–3, 6–0 |
Question:
How many championships have there been with Steffi Graf?
Answer:
Wimbledon