After all the relaxation and overindulgence of the holiday season, most people have returned to the office and are back into the working groove. Looking ahead to 2018, workers in some countries are facing a far longer shift than others. According to the OECD, Mexicans work the most hours out of any country every year, 2,246 on average. That's 467 more hours than the average American every year and for less than a fifth of the pay.