Paper has been rolling off the printing presses of central banks all across the world in an attempt to mask reality. The influx of monetary stimulus from QE and massive government deficit spending has created the illusion of more pent up demand then exists or can be substantiated. This has resulted in an elevated baseline for comparing year on year growth.
In short, we have to move forward faster next year just to keep growing. This means the bar is constantly being lifted and we must sell even more next year in order to move forward. The whole concept of economic growth is based on an ever-growing trend of year over year increased production which is difficult to achieve. The article below delves into what this phenomenon.