According to this video.
http://www.youtube.com/watch?v=F4fWQnguR1E
It shows a graph at about 48 seconds in.
Here: I've excerpted it:


Gold is $1,581/oz today. When it hits $2,000, it will be up 26.5%. Let's see how long that takes. - De 3/11/2013 - ANSWER: 7 Years, 5 Months