What is the replacement birthrate (total fertility rate) for the US, and other developed countries, and what does this mean for business firms?

What is the replacement birthrate (total fertility rate) for the US, and other developed countries, and what does this mean for business firms?Using the article link below and any other resources you may need to answer the above question:http://www.usatoday.com/story/news/nation/2013/02/12/us-births-decline/1880231/
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