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 | Name of show | Episodes | Other guests | Winner(s) |
| --- | --- | --- | --- | --- |
| 1997 | Super Trio Series 2: Movie Buff Championship | 18 | Florence Kwok, Joey Leung, Shen Yu, Eddie Ng, Athena Chu | Charmaine Sheh |
| 2000 | The Super Trio Show | 06 | Julian Cheung, Calvin Choy, Sherming Yiu, Yuen Wah, Liz Kong | Charmaine Sheh, Julian Cheung |
| 2002 | A Trio Delights | 03 | Timmy Hung, Ken Wong, Stephanie Che, Louis Yuen, Cutie Mui | Louis Yuen |
| 2004 | The Super Trio Continues | 07 | Michael Tao, Kenix Kwok, Cheung Tat-Ming, Wong Ceng, Nnadia Chan | Charmaine Sheh, Michael Tao |
| 2007 | Foodie 2 Shoes | 19, 20 | Chin Ka Lok, Edmond Leung, Vanessa Yeung | Charmaine Sheh, Chin Ka Lok |
| 2008 | Super Trio Supreme | 01 | Bosco Wong, Michael Miu, Cutie Mui, Johnny Tang, Krystal Tin, Tiffany Hew, Cleo Tay, Crystal Wong | Charmaine Sheh, Cutie Mui |
| 2009 | Are You Smarter Than a 5th Grader? | 05, 06 |  | HK$175,000 (Levels 8/11) |
| 2010 | Super Trio Game Master | 20 | Moses Chan, Kenneth Ma, Raymond Wong, Lee Heung Kam, Louis Yuen, Selena Li, Susan Tse, Lee Kwok Leung, Edwin Siu, Elaine Yiu, Yoyo Chen, Charmaine Li | Tie |
| 2011 | All Star Glam Exam | 08 | Ekin Cheng, Eric Kot, Fala Chen | Charmaine Sheh |
Question:
how long has it been since chermaine sheh first appeared on a variety show?
Answer:
17 years