The United States is once again approaching the debt ceiling, with Treasury Secretary Janet Yellen suggesting that the “X” date could be reached as soon as June 1st. The consequences of not raising the debt ceiling would be severe to the U.S. and global economies, given that the U.S. dollar is considered the world’s reserve currency. This week’s chart of the week looks at the number of times the debt ceiling has been raised going back to 1980, including which presidential parties were in office and the makeup of congress at the time.