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 | Dates | Champion | Country | Winning score | To par | Margin of victory | Purse ( $ ) | Winners share ($) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2012.0 | Sep 20–23 | Stacy Lewis | United States | 66-70-65-69=270 | –18 | 2 strokes | 1300000.0 | 195000.0 |
| 2011.0 | Sep 15–18 | Lexi Thompson 1 | United States | 66-68-67-70=271 | –17 | 5 strokes | 1300000.0 | 195000.0 |
| 2010.0 | Oct 7–10 | Katherine Hull | Australia | 68-67-67-67=269 | –19 | 1 stroke | 1300000.0 | 195000.0 |
| 2009.0 | Oct 1–4 | Lorena Ochoa (2) | Mexico | 66-68-66-70=270 | –18 | 4 strokes | 1400000.0 | 210000.0 |
| 2008.0 | Sep 25–28 | Lorena Ochoa | Mexico | 67-67-69-70=273 | –15 | Playoff 2 | 1400000.0 | 210000.0 |
Question:
What is the number of "to par" in Mexico with a winning score of 67-67-69-70=273?
Answer:
–15