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 | Division | League | Regular Season | Playoffs | Open Cup | Avg. Attendance |
| --- | --- | --- | --- | --- | --- | --- |
| 2001 | 2 | USL A-League | 4th, Western | Quarterfinals | Did not qualify | 7,169 |
| 2002 | 2 | USL A-League | 2nd, Pacific | 1st Round | Did not qualify | 6,260 |
| 2003 | 2 | USL A-League | 3rd, Pacific | Did not qualify | Did not qualify | 5,871 |
| 2004 | 2 | USL A-League | 1st, Western | Quarterfinals | 4th Round | 5,628 |
| 2005 | 2 | USL First Division | 5th | Quarterfinals | 4th Round | 6,028 |
| 2006 | 2 | USL First Division | 11th | Did not qualify | 3rd Round | 5,575 |
| 2007 | 2 | USL First Division | 2nd | Semifinals | 2nd Round | 6,851 |
| 2008 | 2 | USL First Division | 11th | Did not qualify | 1st Round | 8,567 |
| 2009 | 2 | USL First Division | 1st | Semifinals | 3rd Round | 9,734 |
| 2010 | 2 | USSF D-2 Pro League | 3rd, USL (3rd) | Quarterfinals | 3rd Round | 10,727 |
Question:
how many times did the usl a-league reach the quarterfinals?
Answer:
2