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 | Men's singles | Women's singles | Men's doubles | Women's doubles | Mixed doubles |
| --- | --- | --- | --- | --- | --- |
| 1991 | Tamas Gebhard | Andrea Harsági | Tamas Gebhard Richard Banhidi | Andrea Dakó Andrea Harsági | Jeliazko Valkov Diana Filipova |
| 1992 | Iasen Borisov | Reni Asenova | Michail Popov Tzvetozar Soyanov | Reni Asenova Raina Tzvetkova | Emerik Balazs Erika Stich |
| 1993 | Anatoliy Skripko | Elena Nozdran | Vladislav Druzchenko Valeri Streltsov | Elena Nozdran Irina Koloskova | Valeri Streltsov Elena Nozdran |
| 1994 | No competition | No competition | No competition | No competition | No competition |
| 1995 | Mihail Popov | Victoria Hristova | Mihail Popov Liyben Panov | Victoria Hristova Raina Tzvetcova | Svetoslav Stoyanov Raina Tzvetcova |
| 1996–1997 | No competition | No competition | No competition | No competition | No competition |
| 1998 | Konstantin Dobrev | Csilla Forian | Konstantin Dobrev Asparuch Nedkov | Diana Koleva Raina Tzvetkova | Konstantin Dobrev Diana Koleva |
| 1999 | Hidetaka Yamada | Maja Pohar | Manuel Dubruille Vincent Laigle | Diana Koleva Nely Nedjalkova | Andrej Pohar Maja Pohar |
| 2000 | Oliver Pongratz | Lonneke Janssen | Mathias Boe Michael Jensen | Britta Andersen Lene Mørk | Mathias Boe Britta Andersen |
| 2001 2005 | No competition | No competition | No competition | No competition | No competition |
| 2006 | Jan Vondra | Petya Nedelcheva | Vladimir Metodiev Stilian Makarski | Petya Nedelcheva Diana Dimova | Stilian Makarski Diana Dimova |
| 2007 | Sho Sasaki | Tracey Hallam | Kenichi Hayakawa Kenta Kazuno | Fiona Mckee Charmaine Reid | Valeriy Atrashchenkov Elena Prus |
| 2008 | Ville Lang | Hwang Hye-youn | Vladimir Metodiev Krasimir Yankov | Olga Golovanova Anastasia Prokopenko | Stilian Makarski Diana Dimova |
| 2009 | Dionysius Hayom Rumbaka | Petya Nedelcheva | Julian Hristov Vladimir Metodiev | Petya Nedelcheva Dimitria Popstoikova | Valeriy Atrashchenkov Elena Prus |
| 2010 | Yeoh Kay Bin | Hitomi Oka | Jürgen Koch Peter Zauner | Shinta Mulia Sari Yao Lei | Chayut Triyachart Yao Lei |
| 2011 | Koichi Saeki | Minatsu Mitani | Sam Magee Tony Stephenson | Alex Bruce Michelle Li | Sam Magee Chloe Magee |
| 2012 | Marcel Reuter | Kana Ito | Laurent Constantin Sebastien Vincent | Sandra-Maria Jensen Line Kjaersfeldt | Edi Subaktiar Melati Daeva Oktaviani |
| 2013 | Takuto Inoue | Beatriz Corrales | Takuto Inoue Yuki Kaneko | Irina Khlebko Ksenia Polikarpova | Choi Sol-kyu Kim Hye-rin |
Question:
What year did Lonneke Janssen win the Women's singles?
Answer:
2000.0