On 1 November 2007, the index was at 6873.20, its highest value....

• On 1 November 2007, the index was at 6873.20, its highest value.
• As of 22 January 2008, it had fallen to 5,222.0 points due to turmoil related to the US 2007 subprime mortgage financial crisis, a 24 percent fall

Yes, got my dates wrong, its even worse!

Was meaning 7 year ago, coming up next month. Nov 1st (old peak)

5222 was initial fall out from GFC, then it went even lower to March 2009 as your graph clearly shows..