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:
| Date | Winner | Yacht | Loser | Yacht | Score | Delta |
| --- | --- | --- | --- | --- | --- | --- |
| September 14, 1983 | Liberty | US-40 | Australia II | KA-6 | 1-0 | 1:10 |
| September 15, 1983 | Liberty | US-40 | Australia II | KA-6 | 2-0 | 1:33 |
| September 18, 1983 | Australia II | KA-6 | Liberty | US-40 | 1-2 | 3:14 |
| September 20, 1983 | Liberty | US-40 | Australia II | KA-6 | 3-1 | 0:43 |
| September 21, 1983 | Australia II | KA-6 | Liberty | US-40 | 2-3 | 1:47 |
| September 22, 1983 | Australia II | KA-6 | Liberty | US-40 | 3-3 | 3:25 |
| September 26, 1983 | Australia II | KA-6 | Liberty | US-40 | 4-3 | 0:41 |
Question:
what was the score difference for the september 15th game?
Answer:
2