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:
| Season | A\nTechnical | B\nScientific | C\nFine Arts | D\nImprovisational | E\nStructural | Rising Stars!® | pO\nprojectOUTREACH® | University Level |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2014-2015 | Creature Feature | Making Waves | Feary Tales | The Improv Games | Lose to Win | Animal Mish Mash | Brand Aid | It's a Stretch |
| 2013-2014 | Dig In | Going to Extremes | Laugh Art Loud | Pandemonium! | The Tension Builds | Circus! | Pitch and Play |  |
| 2012-2013 | In the Zone | Windvisible | In Disguise | Change in RealiTEE | twist-o-rama | ROY G BIV | Real to Reel |  |
| 2011-2012 | Assembly Required | The Solar Stage | Coming Attractions | News To Me | Hold It! | Built to Last | The World Canvas |  |
| 2010-2011 | Unidentified Moving Object | Spinning a Tale | Triple Take Road Show | Mythology Mission | Verses! Foiled Again! | Big Bug's Bad Day | Dynamic Networks |  |
| 2009-2010 | DIrect DIposit | DI-Bot | You’re Gonna Flip! | Do or DI | Breaking DI News | Weighty News | Band Together |  |
| 2008-2009 | Operation Cooperation | Instinct Messaging | ViDIo Lit Hits | Private DI | A New Angle! | Hidden! | Take Charge |  |
| 2007-2008 | Obstacles, Of Course! | Hit or Myth | DI've Got a Secret! | Chorific! | SWITCH! | TwisDId History |  |  |
| 2006-2007 | DIrect Flight | CSI-DI | Round About Courage | Switching TraDItions | Card-DI-ology | Make It New, It's Up To You |  |  |
| 2005-2006 | Back At You! | Kidz Rulz! | How’d tHAT Happen? | On Safari | The Inside DImension | 1-2-Change-A-ROO |  |  |
| 2004-2005 | DIzzy Derby | Sudden SerenDIpity | Live! It's RaDIo DI! | IMPROVing Along | DIsigning Bridges | More to the Story! |  |  |
| 2003-2004 | Destinations in Time | The Plot and the Pendulum | Cartoon DImensions | Upbeat Improv | GuessDImate! | Surprise Trip! |  |  |
| 2002-2003 | Change in DIrection | ViDIo Adventure | Theatre Smarts | Once Improv A Time | ConnecDId | Lost and Found |  |  |
| 2001-2002 | It's Your Move | StranDId | On Holiday | The Art of Improv | Dual DI-lemma |  |  |  |
| 2000-2001 | IncreDIble TechEffects | Mystery Loves Company | Anonymously Yours | DInamic Improv | Triplicity |  |  |  |
| 1999-2000 | Fruit Roller Coaster & Eggploration | If Music Be the Food of Life... Play on! | Mixing Apples and Oranges | Instant Pudding Improv | It's Not Impastable! |  |  |  |
Question:
how many more challenges were there in 2014-2015 than in 2006-2007?
Answer:
2