Homeground: Historical Data and Analysis

Immigration:

Relevant Legislation:
1917: Added to the exclusion list were illiterates, persons of psychopathic inferiority, men as well as women entering for immoral purposes, alcoholics, stowaways, and vagrants.
1921: The first quantitative immigration law was adopted. It set temporary annual quotas according to nationality. A book review of Not Like Us: Immigrants and Minorities in America, 1890-1924, which discusses this period is available here.
1924: The first permanent immigration quota law established a preference quota system, nonquota status, and consular control system. It also established the Border Patrol.
1929: The annual quotas of the 1924 Act were made permanent.
1943: Legislation provided for the importation of agricultural workers from North, South, and Central America--the basis of the "Bracero Program." At the same time the Chinese exclusion laws were repealed.
1946: Procedures were adopted to facilitate immigration of foreign-born wives, fiance(e)s, husbands, and children of U.S. armed forces personnel.
1948: The first U.S. policy was adopted for admitting persons fleeing persecution. It permitted 205,000 refugees to enter the United States over two years (later increased to 415,000).
1950: The grounds for exclusion and deportation of subversives were expanded. All aliens were required to report their address annually.
1952: The multiple laws which governed immigration and naturalization to that time were brought into one comprehensive statute. It (1) reaffirmed the national origins quota system, (2) limited immigration from the Eastern Hemisphere while leaving the Western Hemisphere unrestricted, (3) established preferences for skilled workers and relatives of U.S. citizens and permanent resident aliens; and (4) tightened security and screening standards and procedures.
1953: The 1948 law was increased to admit over 200,000 refugees above the existing limit.
1965: The national origins quota system was abolished. But still maintained was the principle of numerical restriction by establishing 170,000 Hemispheric and 20,000 per country ceilings and a seven-category preference system (favoring close relatives of U.S. citizens and permanent resident aliens, those with needed occupational skills, and refugees) for the Eastern Hemisphere and a separate 120,000 ceiling for the Western Hemisphere.

Other events:
The domination of Eastern Europe by Germany in the 30s closed many of the doors that had been available to those looking to emigrate to the United States. That, combined with the limitations on immigration from US legislation, and the effect of the Depression on the national and world economy, accounted for the sharp drop in immigration in the 1930s. After the end of World War II, a number of legislative efforts to allow refugees into the country contributed to the increase in immigration.

[Data and the "Relevant Legislation" section, up to "Other Events", are taken from http://www.fairus.org/Research/Research.cfm?ID=1820&c=2

Life expectancy (Male/Female):

1910: 48.4/51.8
1911: 50.9/54.4
1912: 51.5/55.9
1913: 50.3/55.0
1914: 52.0/56.8
1915: 52.5/56.8
1916: 49.6/54.3
1917: 48.4/54.0
1918: 36.6/42.2
1919: 53.5/56.0
1920: 53.6/54.6
1921: 60.0/61.8
1922: 48.4/61.0
1923: 56.1/58.5
1924: 58.1/61.5
1925: 57.6/60.6
1926: 56.5/58.0
1927: 59.0/62.1
1929: 55.6/58.3
1929: 55.8/58.7
1930: 58.1/61.6
1931: 59.4/63.1
1932: 61.0/63.5
1933: 61.7/65.1
1934: 59.3/63.3
1935: 59.9/63.9
1936: 56.6/60.6
1937: 58.0/62.4
1938: 61.9/65.3
1939: 62.1/65.4
1940: 60.8/65.2
1941: 63.1/66.8
1942: 64.7/67.9
1943: 62.4/64.4
1944: 63.6/66.8
1945: 63.6/67.9
1946: 64.4/69.4
1947: 64.4/69.7
1948: 64.6/69.9
1949: 66.2/70.7
1950: 65.6/71.1
1951: 65.6/71.4
1952: 65.8/71.6
1953: 66.0/72.0
1954: 63.7/72.8
1955: 66.7/72.8
1956: 66.7/72.9
1957: 66.4/72.7
1958: 66.6/72.9
1959: 66.8/73.2
1960: 66.6/73.1
1961: 67.1/73.6
1962: 66.9/73.5
1963: 66.6/73.4
1964: 63.8/73.7
1965: 66.8/73.8

(Life expectancy data is from CDC data.)

Votes cast in presidential elections:

Consumer Price Index:

The advent of WWI increased inflation substantially, as world economic markets felt the turmoil in Europe. The Depression period saw a substantial decrease in the CPI, as deflationary pressures ran rampant. The US entry into World War II, and the subsequent war-footing of the economy, increased inflation substantially due to the significant capital borrowing to fund the construction of the American war machine. The increase in inflation in 1947 was due in part to the large number of workers who had returned from war and entered the workforce, driving up the amount of money that was available to the average American consumer.

Military enrollmeent and population ratio:

GDP

[Out of Game]