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 | Team | Co-Drivers | Car | Class | Laps | Pos. | Class\nPos. |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2001 | Team Den Blå Avis\n Team Goh | John Nielsen\n Hiroki Katoh | Dome S101-Judd | LMP900 | 66 | DNF | DNF |
| 2003 | RN Motorsport | John Nielsen\n Hayanari Shimoda | DBA4 03S-Zytek | LMP675 | 288 | 22nd | 2nd |
| 2004 | Lister Racing | John Nielsen\n Jens Møller | Lister Storm LMP-Chevrolet | LMP1 | 279 | 24th | 9th |
| 2006 | Zytek Engineering\n Team Essex Invest | John Nielsen\n Philip Andersen | Zytek 06S | LMP1 | 269 | NC | NC |
| 2007 | Aston Martin Racing Larbre | Christophe Bouchut\n Fabrizio Gollin | Aston Martin DBR9 | GT1 | 341 | 7th | 3rd |
| 2008 | Team Essex | John Nielsen\n Sascha Maassen | Porsche RS Spyder Evo | LMP2 | 347 | 12th | 2nd |
| 2009 | Team Essex | Kristian Poulsen\n Emmanuel Collard | Porsche RS Spyder Evo | LMP2 | 357 | 10th | 1st |
| 2011 | Hope Racing | Steve Zacchia\n Jan Lammers | Oreca 01-Swiss HyTech | LMP1 | 115 | DNF | DNF |
Question:
who was casper elgaard's co-driver the most often for the 24 hours of le mans?
Answer:
John Nielsen