First of all, it's a good point. There's a substantial level of uncertainty in those forecasts, because when we're saying to look two or three years down the road in terms of the total employment situation, it's hard to guess.
That being said, the announcement in September 2013 was to freeze the rate for three years to provide predictability and stability for employers and employees, and they clarified back then that the new mechanism would kickstart in 2017.