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 |
| --- | --- | --- | --- | --- | --- |
| 1984.0 | Icuk Sugiarto | Helen Troke | Christian Hadinata Hadibowo | Gillian Gilks Karen Beckman | no competition |
| 1985.0 | Icuk Sugiarto | Wu Jianqiu | Rudy Heryanto Bobby Ertanto | Guan Weizhen Wu Jianqiu | no competition |
| 1986.0 | no competition | no competition | no competition | no competition | no competition |
| 1987.0 | Zhao Jianhua | Luo Yun | Tian Bingyi Li Yongbo | Guan Weizhen Lin Ying | Peter Buch Grete Mogensen |
| 1988.0 | Xiong Guobao | Li Lingwei | Tian Bingyi Li Yongbo | Chung Myung-hee Hwang Hye-young | Steen Fladberg Gillian Clark |
| 1989.0 | Alan Budikusuma | Tang Jiuhong | Park Joo-bong Kim Moon-soo | Guan Weizhen Lin Ying | Park Joo-bong Chung Myung-hee |
| 1990.0 | Sompol Kukasemkij | Huang Hua | Park Joo-bong Kim Moon-soo | Yao Fen Lai Caiqin | Park Joo-bong Chung Myung-hee |
| 1991.0 | Alan Budikusuma | Susi Susanti | Eddy Hartono Rudy Gunawan | Hwang Hye-young Gil Young-ah | Lee Sang-bok Chung So-young |
| 1992.0 | Joko Suprianto | Susi Susanti | Ricky Subagja Rexy Mainaky | Nong Qunhua Zhou Lei | Aryono Miranat Eliza Nathanael |
| 1993.0 | Joko Suprianto | Susi Susanti | Bambang Suprianto Rudy Gunawan | Ge Fei Gu Jun | Liu Jianjun Wang Xiaoyuan |
| 1994.0 | Joko Suprianto | Susi Susanti | Denny Kantono Antonius Budi Ariantho | Ge Fei Gu Jun | Tri Kusharjanto Minarti Timur |
| 1995.0 | Dong Jiong | Lim Xiaoqing | Jiang Xin Huang Zhanzhong | Gil Young-ah Jang Hye-ock | Park Joo-bong Ra Kyung-min |
| 1996.0 | Dong Jiong | Wang Chen | Candra Wijaya Sigit Budiarto | Deyana Lomban Indarti Isolina | Tri Kusharjanto Minarti Timur |
| 1997.0 | Hendrawan | Wang Chen | Yoo Yong-sung Lee Dong-soo | Tang Yongshu [Qin Yiyuan]] | Michael Søgaard Rikke Olsen |
| 1998.0 | no competition | no competition | no competition | no competition | no competition |
| 1999.0 | Chen Gang | Dai Yun | Yu Jinhao Chen Qiqiu | Qin Yiyuan Gao Ling | Liu Yong Ge Fei |
| 2000.0 | Hendrawan | Ye Zhaoying | Zhang Jun Zhang Wei | Ge Fei Gu Jun | Zhang Jun Gao Ling |
| 2001.0 | Yong Hock Kin | Tracey Hallam | Sigit Budiarto Luluk Hadiyanto | Eny Erlangga Jo Novita | Candra Wijaya Jo Novita |
| 2002.0 | no competition | no competition | no competition | no competition | no competition |
| 2003.0 | Ronald Susilo | Dai Yun | Yoo Yong-sung Ha Tae-kwon | Wei Yili Zhao Tingting | Chen Qiqiu Zhao Tingting |
| 2004.0 | Boonsak Ponsana | Yao Jie | Luluk Hadiyanto Alvent Yulianto | Zhang Dan Zhang Yawen | Nathan Robertson Gail Emms |
| 2005.0 | Muhammad Hafiz Hashim | Yao Jie | Jung Jae-sung Lee Jae-jin | Lee Kyung-won Lee Hyo-jung | Lee Jae-jin Lee Hyo-jung |
| 2006.0 | Chen Yu | Zhu Lin | Lee Yong-dae Jung Jae-sung | Lee Kyung-won Lee Hyo-jung | Lee Yong-dae Hwang Yu-mi |
| 2007.0 | Chen Hong | Zhu Lin | Lee Jae-jin Hwang Ji-man | Gao Ling Huang Sui | He Hanbin Yu Yang |
| 2008.0 | Lin Dan | Xie Xingfang | Fu Haifeng Cai Yun | Yang Wei Zhang Jiewen | Xie Zhongbo Zhang Yawen |
| 2009.0 | Nguyen Tien Minh | Liu Jian | Chan Peng Soon Lim Khim Wah | Yang Wei Zhang Jiewen | Songphon Anugritayawon Kunchala Voravichitchaikul |
| 2010.0 | cancelled | cancelled | cancelled | cancelled | cancelled |
| 2011.0 | Chen Long | Li Xuerui | Jung Jae-sung Lee Yong-dae | Tian Qing Zhao Yunlei | Lee Sheng-mu Chien Yu-chin |
| 2012.0 | Sony Dwi Kuncoro | Saina Nehwal | Liu Xiaolong Qiu Zihan | Lam Narissapat Saralee Thungthongkam | Tao Jiaming Tang Jinhua |
| 2013.0 | Srikanth Kidambi | Ratchanok Inthanon | Shin Baek-cheol Yoo Yeon-seong | Greysia Polii Nitya Krishinda Maheswari | Markis Kido Pia Zebadiah |
Question:
What is the average year with Nathan Robertson Gail Emms in mixed doubles?
Answer:
2004.0