The foreign-born (FB) population increased from 258,891 in 1970 to 570,193 in 2010. That was an increase of 120.2 percent. The foreign-born share changed from 4.9 percent to 9.6 percent.
The share of the overall population that was native-born (NB) increased by 6.7 percent.
Philadelphia MSA: Population 1970-2010
The first chart below shows the three population change factors for three periods adjusted for annual average amounts. Domestic migration (NDM) was consistently negative and B-D was the primary factor in population increase in all periods.
The second chart shows the same data but with an adjustment to reflect births to immigrants shifted to NIM. In it, net immigration (NIM) became the primary factor in population increase in the two most recent periods.
Philadelphia MSA: Sources of Population Change 1990-2014 Philadelphia MSA: Sources of Population Change (Adjusted) 1990-2014
B-D NDM NIM B-D NDM NIM 90-'99 71.8% neg. 28.2% 90-'99 50.8% neg. 49.2% 00-'09 62.1% neg. 37.9% 00-'09 35.9% neg. 64.1% 10-'14 51.6% neg. 48.4% 10-'14 21.5% neg. 78.5%
1/ PA counties: Bucks, Chester, Delaware, Montgomery, and Philadelphia: NJ counties: Burlington, Camden, Gloucester, and Salem; Cecil County, MD and New Castle County, DE.
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