(1) per capita birth rate (B/N) for US = 0.014 and per capita death rate (D/N) for US = 0.008
(2) Crude birth rate for US = approximately 14 per 1000 persons
(calculated from N of approximately 300 million persons, and approximately 4.2 million births [= (4,230,000 / 302,200,000) X 1,000])
Crude death rate for US = 8 per 1000 persons
(calculated from N of approximately 300 million persons, and approximately 2.4 million deaths, as above for crude birth rate)
(3) r = b-d therefore r =(0.014 - 0.008) = 0.006 for the US in 2007
(4) G = (b-d)*N = rN = 0.006 * 302 million = 1,812,000 persons = current population growth rate (net gain) for US per year
(5) No, we are growing at about 1.8 million persons per year INDEPENDENT of immigration. This population growth rate of approximately 1.8 million persons per year is about twice the net immigration into the US per year (which is about 897,000 persons)
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This page is maintained by Patricia Muir at Oregon State University. You can address questions or comments to me at (muirp@science.oregonstate.edu) . Page last updated Nov. 1, 2007.