Sources used:
https://www.quandl.com/data/ODA/USA_NGDPD-United-States-GDP-at-Current-Prices-USD-Billions
https://www.quandl.com/data/ODA/USA_GGX-United-States-General-Government-Total-Expenditure-USD-Billions
https://www.quandl.com/data/WWDI/USA_MS_MIL_XPND_CN-Military-expenditure-current-LCU-United-States
https://www.migrationpolicy.org/programs/data-hub/us-immigration-trends#history
https://data.worldbank.org/indicator/SP.DYN.CBRT.IN?locations=US&view=chart
https://www.quandl.com/data/ODA/USA_LP-United-States-Population-Millions
https://www.quandl.com/data/ODA/USA_PCPI-United-States-Inflation-Index-Average-Consumer-Prices
https://www.quandl.com/data/ODA/USA_GGXWDG-United-States-General-Government-Gross-Debt-USD-Billions
https://fred.stlouisfed.org/series/MDOAH