When did the term "shark tank" enter our lexicon?

I’m a software engineer and have been in this industry for about 4 years now. I love the fact that you can get rich with a solid idea and about $100. I have been spending a lot of time on this website and have been watching a bunch of other startup founders on YouTube, so I’m wondering when the term “shark tank” entered our lexicon as a metaphor for finding investors?<br><br>I know the show has been around since 2009, but my wife always quotes the line “I’m out” when we talk about deals or business. I think she got it from a friend of hers.