I'd have to do some digging but the Crude Oil Industy is THE LARGEST on the planet.. most of the top fortune 500 are energy producers..  Anywho.. Stat I read somewhere was that US Energy Capital investment was north of $200 billion per year.. in 2013'ish.. 2014..  Much of that has gone.. "poof" not all but Energy producers have Slashed budgets.. laid off people.. Schlumberger is going to lay off another 10,000 people.. etc..

( http://www.naturalgasintel.com/articles/105089-schlumberger-lays-of... ) 

We continue to have laid down 1,000 drilling rigs vs a year ago.. that's an amazing statistic.. http://www.wtrg.com/rotaryrigs.html