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 | Competition | Venue | Position | Event | Notes |
| --- | --- | --- | --- | --- | --- |
| 2003 | World Youth Championships | Sherbrooke, Canada | 1st | 3000 m | 9:12.70 |
| 2004 | World Junior Championships | Grosseto, Italy | 3rd | 1500 m | 4:17.39 |
| 2004 | World Junior Championships | Grosseto, Italy | 3rd | 3000 m | 9:03.16 (PB) |
| 2007 | World Athletics Final | Stuttgart, Germany | 8th | 1500 m | 4:16.51 |
| 2007 | World Championships | Osaka, Japan | 31st (h) | 1500 m | 4:22.12 |
| 2008 | World Indoor Championships | Valencia, Spain | 5th | 1500 m | 4:15.54 |
| 2008 | Olympic Games | Beijing, China | 10th | 1500 m | 4:05.57 |
| 2009 | Mediterranean Games | Pescara, Italy | 4th | 1500 m | 4:12.83 |
| 2009 | World Championships | Berlin, Germany | 29th (h) | 1500 m | 4:10.57 |
| 2009 | Jeux de la Francophonie | Beirut, Lebanon | 2nd | 1500 m | 4:21.56 |
| 2010 | African Championships | Nairobi, Kenya | 11th | 1500 m | 4:20.98 |
| 2011 | World Championships | Daegu, South Korea | 16th (sf) | 1500 m | 4:09.64 |
| 2011 | Pan Arab Games | Doha, Qatar | 2nd | 1500 m | 4:20.83 |
| 2012 | World Indoor Championships | Istanbul, Turkey | 11th (h) | 1500 m | 4:11.69 |
| 2013 | Mediterranean Games | Mersin, Turkey | 2nd | 800 m | 2:00.79 |
| 2013 | Mediterranean Games | Mersin, Turkey | 1st | 1500 m | 4:04.06 |
| 2013 | World Championships | Moscow, Russia | 11th | 1500 m | 4:09.16 |
| 2013 | Jeux de la Francophonie | Nice, France | 4th | 800 m | 2:03.73 |
| 2013 | Jeux de la Francophonie | Nice, France | 2nd | 1500 m | 4:18.89 |
| 2014 | World Indoor Championships | Sopot, Poland | 4th | 1500 m | 4:07.62 |
Question:
her best time for the 1500 m was 4:04.06 in 2013. what was her previous best time?
Answer:
4:05.57