HopeTracker| The US birthrate has dropped to its lowest rate in a century. In 2009 the birthrate was 13.5 births for every 1,000 people. In 2007 the birth rate in America was 14.3, compared to 30 in 1909, when big families were more common. Reduced immigration may also be causing a drop in birth rates. For a look an other international birth rates, follow link.