Often when data is presented for the United States, it is aggregated at the national level. National data ignores regional, state and local differences and provides measures of the country as a whole. While this does not necessarily provide a nuanced view of the data, it does set a measure for comparison. Are cities growing or shrinking in the US as a whole? Are we aging? Are we gaining wealth? Are our wages increasing or decreasing? Collecting this and a lot more data at the national level can help us to understand aspects of our country and set a national baseline that will allow us to measure regions, states, and cities against the baseline so that we can understand the context of a more focused data.
Here is a little bit of that data:
- 3,794,083 sq. miles
- US Population: 281,421,906 (2000); 308,745,538 (2010); 321,406,253 (2015 est.)
- 49.1% (2000) and 49.3% (2010) male population
- 74.47% (2000) and 76.26% (2010) population over 18
- 22.0% increase from 2000 to 2010 in total female householders with no husband present
- 10.7% increase from 2000 to 2010 in total occupied housing units
- Population density in persons/sq. mi. of 314.63 (2000), 333.63 (2010) and 358.47 (2015 est.)
- Median age from 35.63 (2000) to 37.50 (2010)
- Decrease in total institutionalized population by 1.7% from 2000 to 2010
Brookings Graph on loss of US manufacturing jobs since 1980. http://www.brookings.edu/blogs/the-avenue/posts/2016/03/15-voter-anger-explained-muro-kulkarni
Brookings article on manufacturing.