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:
| No. | Date | Tournament | Winning score | Margin of\nvictory | Runner(s)-up |
| --- | --- | --- | --- | --- | --- |
| 1 | 20 Jan 2008 | Abu Dhabi Golf Championship | −15 (66-65-68-74=273) | 4 strokes | Henrik Stenson, Lee Westwood |
| 2 | 22 Jun 2008 | BMW International Open | −15 (68-63-67-75=273) | Playoff | Anders Hansen |
| 3 | 5 Jul 2009 | Open de France ALSTOM | −13 (62-72-69-68=271) | Playoff | Lee Westwood |
| 4 | 12 Jul 2009 | Barclays Scottish Open | −15 (69-65-66-69=269) | 2 strokes | Gonzalo Fernández-Castaño, Raphaël Jacquelin |
| 5 | 24 Jan 2010 | Abu Dhabi Golf Championship | −21 (67-67-67-66=267) | 1 stroke | Ian Poulter |
| 6 | 15 Aug 2010 | PGA Championship | −11 (72-68-67-70=277) | Playoff | Bubba Watson |
| 7 | 12 Sep 2010 | KLM Open | −14 (67-67-66-66=266) | 4 strokes | Christian Nilsson, Fabrizio Zanotti |
| 8 | 10 Oct 2010 | Alfred Dunhill Links Championship | −17 (68-69-68-66=271) | 3 strokes | Danny Willett |
| 9 | 23 Jan 2011 | Abu Dhabi HSBC Golf Championship | −24 (67-65-66-66=264) | 8 strokes | Rory McIlroy |
| 10 | 6 Nov 2011 | WGC-HSBC Champions | −20 (69-68-68-63=268) | 3 strokes | Fredrik Jacobson |
Question:
how long separated the playoff victory at bmw international open and the 4 stroke victory at the klm open?
Answer:
2 years