http://www.usatoday.com/story/news/nation/2013/02/12/us-births-decline/1880231/
We have a surplus of people with not enough jobs for them since more jobs in the US are either outsourced or replaced by technology.
So it seems a declining birthrate makes sense, as people are unable to afford a family due to a declining middle class, you should see a downtrend in births and immigration.
This will happen until we reach some sort of equilibrium where there are now enough jobs for the population and the economy supports the ability of families to have children and raise them.
We have a surplus of people with not enough jobs for them since more jobs in the US are either outsourced or replaced by technology.
So it seems a declining birthrate makes sense, as people are unable to afford a family due to a declining middle class, you should see a downtrend in births and immigration.
This will happen until we reach some sort of equilibrium where there are now enough jobs for the population and the economy supports the ability of families to have children and raise them.