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 | Notes |
| --- | --- | --- | --- | --- |
| 2006 | IAAF World Athletics Final | Stuttgart, Germany | 5th | 110 m hurdles |
| 2007 | World Championships | Osaka, Japan | 4th (semis) | 110 m hurdles |
| 2008 | World Indoor Championships | Valencia, Spain | 4th (semis) | 60 m hurdles |
| 2008 | Olympic Games | Beijing, China | 3rd | 110 m hurdles |
| 2008 | IAAF World Athletics Final | Stuttgart, Germany | 1st | 110 m hurdles |
| 2010 | World Indoor Championships | Doha, Qatar | 3rd | 60 m hurdles |
| 2010 | 2010 Diamond League | Multiple Locations | 1st | 110 m hurdles |
| 2013 | 2013 Diamond League | Multiple Locations | 1st | 110 m hurdles |
| 2013 | World Championships | Moscow, Russia | 1st | 110 m hurdles |
Question:
the number of times david oliver placed 1st in 100m hurdles between the years 2006-2013.
Answer:
4