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:
| Tournament | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Grand Slam tournaments | Grand Slam tournaments | Grand Slam tournaments | Grand Slam tournaments | Grand Slam tournaments | Grand Slam tournaments | Grand Slam tournaments | Grand Slam tournaments | Grand Slam tournaments |
| Australian Open | 2R | 2R | 1R | 1R | A | 1R | 2R | A |
| French Open | 2R | 3R | A | 1R | A | 1R | A | A |
| Wimbledon | 1R | A | A | 1R | A | 2R | A | A |
| US Open | 2R | 2R | A | A | 2R | A | A | 1R |
Question:
What is 2005, when 2006 is "1R"?
Answer:
2R