Do you know each other? <a href=" http://www.innerpedia.org/index.php/is-metoprolol-tartrate-the-same-as-toprol-xl.pdf ">toprol metoprolol conversion</a> In 2011, U.S. oil and gas companies added almost 3.8 billion barrels of crude oil and related reserves, an increase of 15%, the biggest jump since the U.S. Energy Information Administration began publishing proved reserves estimates in 1977, the government said last month.